Answer:
part a is B. and part b is c
Explanation:
A. Purpose
I believe this is purpose because she is writing to argue that distributing medicine to rural parts of the world was worth doing.
Answer:Depends
Explanation:Function. A phrase functions as a verb, noun, preposition, adverb, or an adjective. The role of a phrase in writing depends upon its construction. It expresses an idea in a unit to give additional meanings to the text.