The answer is A. Mercedes threw Andrea, Mercedes' best friend, a surprise party last night. This choice uses an appositive ("Andrea, Mercedes' best friend,") to combine the two sentences. An appositive is a phrase separated from the rest of the sentence by commas that describes something (in this case Andrea).
Choices B and C are incorrect because the uses of the words "but" and "when" to combine the sentences do not make logical sense. Choice D is incorrect because it uses a comma to combine the sentences without a conjunction, creating a run-on sentence.
Hope this helps!
Your supposed to have this in a text or movie because if you reread it you can find the letter and it will tell you everything you need to know.
Instant zone: things that don't matter; latest clothes & gadgets, overspending, chips & candy and social media. Lasting zone: things that matter; Helping others, saving money, working out, eating vegetables, drinking water, studying, volunteering, balanced social time, start a business and regular sleep.
There was a moment near sunset, when katie felt like the old oak, and laying for winter, which had shed its leaves, was the one thing that actually listened
The speaker was speaker III