The answer is, or should be, B. An 'adjective phrase' (or adjectival phrase) is a phrasewhose head word is an adjective, e.g. fond of steak, very happy, quite upset about it, etc.
A. He hates the old man would be correct.
Answer:
interviewing someone who grew up in a region that your research paper discusses
The action or activity of gathering information about consumers' needs and preferences
