Let me break it down for you, starting with:
A. That was when I realized my decision was final; but there was no turning back. Now, at first glance, this seems like a pretty good answer, right? Wrong, you don't need that "but" there, doesn't it seem a bit out of place? Now, I'm not saying this isn't something you can do, but it's not the best answer choice.
B. That was when I realized my decision was final; however, there was no turning back. "However" is a word that you usually don't see people use a lot. Now, to me, as someone who likes lengthy writing, I would choose this answer choice, but since it asks for the best answer choice, this one isn't the correct one.
C. That was when I realized my decision was final; also there was no turning back. Anyone with a brain can tell that this is obviously a wrong answer; you wouldn't just say, "Also, there was no turning back." in the middle of a sentence, it doesn't fit there.
D. That was when I realized my decision was final, and there was no turning back. Read this aloud, you can tell that it sounds and slides off the tongue nicer than the other three sentences.
D is the correct answer.
The correct answer to this open question is the following.
The event or occurrence that made an impact on my country’s situation was the presidential election victory of the left political party "Morena" and his candidate Andrés Manuel López Obrador. His victory in the 2018 elections represented a major advancement in Mexican politics after 40 years of "liberalism" policies that failed and made poor people more poor and rich people richer.
Candidate López Obrador received the support of 30 million votes, a total record in the history of México. His base support was poor and middle social classes that had been suffering the consequences of those "liberalism" years or political corruption and favoritism for big Nacional and multinational corporations at the expense of low and middle classes.
Since the first day of his government, the new President changed the rules on how to make politics in México.
One of the first things he did was to disappear the "personal military service corps," which were responsible for the security of the president. The equivalent of the US Secret Service. Almost 8,000 military men were returned to the army headquarter in the 32 Mexican states for the protection of the people, and he just kept a small group of people that oversees his security; half civilians, half military.
He did not accept to fly in his private military plane. He flights across the nation in commercial flights. So the common citizen can be seated next to the Mexican President at the departure gate or inside the plane, and express his concerns.
That is how he directly communicates with people and his acceptance as President is very high.
Romeo initially describes Juliet as a source of light, like a star, against the darkness: "she doth teach the torches to burn bright! It seems she hangs upon the cheek of night." As the play progresses, a cloak of interwoven light and dark images is cast around the pair. I'm sorry I tried my best
I think it is D.
'It' makes the sentence unclear in purpose