Answer:
Becky is obtaining information using a C. nonmarketing-controlled information source.
Explanation:
A nonmarketing-controlled information source is a source of information which is not part of a marketing campaign, it is not associated to any advertising method. It is most likely a personal suggestion such as a friend's experience with that product.
In this case, Becky is asking a friend about phone recommendations, she is looking for a nonmarketing source of information, basing her research on a personal recommendation that has nothing to do with advertising.
