If the writer paraphrases an opinion that she has read rather than reached independently, she is not required to cite the source. true false

This statement is false.
Any time a writer paraphrases something he or she read somewhere, it means that he or she is paraphrasing somebody else's words, which means that person has to be credited for it. If the writer reached an opinion independently, then they wouldn't have to cite the source, but otherwise, they do, if they want to avoid plagiarism.

The answer would be b.