The answer is: [D]:
___________________________________________________________
They are often used to combine choppy sentences.
______________________________________________________________
Conjunctions are often used to combine choppy sentences.
____________________________________________________________
Note: The questions asks about CONJUNCTIONS —NOT about "contractions".
____________________________________
Choice "A" is incorrect. They are not used to combine two or more LONG sentences. If sentences are already long, then do not need to be combined with a conjunction.
_____________________________________
Choice: "B" is incorrect. To the contrary, the use of conjunctions actually makes sentences longer.
________________________________________
Choice "C" is incorrect. To the contrary, the use of conjunctions should be used (appropriately, of course) in essays. The use of "contractions" should not be used in essays or formal writing.
________________________________________
Choice "D" is correct. They are often used to combine choppy sentences for better reading and engagement.
_______________________________________________________
The correct answer to this open question is the following.
Unfortunately, you did not attach the excerpt from Barack Obama. Without the excerpt, we do not what you are talking about.
However, trying to help you, we did some research and can comment on the following.
The correct answer is "It is the duty of Congress to set aside differences to help America progress."
In the excerpt from "President Barack Obama's State of the Union Address," what does President Obama argue?
Answer:
"It is the duty of Congress to set aside differences to help America progress."
Former President Barack Obama argued that during his state of the Union Address because he wanted to put an end to the differences the legislative branch had with the executive branch, in order to progress with the legislations that were stuck in Congress, and Obama considered were necessary to help the country.
It is common that the President and Congress have political differences. More, when Congress is controlled by a different political party. In this case, Republicans controlled the majority in Congress. So, sometimes Congress rejects a bill from the executive, and other times the President exerts his veto power over legislation created in Congress.
Would you rather give your money to change or know it's safe?
Option D ,
psychological reaction to pain and pleasure...
