Final answer:
The correct change needed in the sentence about John Lewis would be to lowercase the word 'Congressman,' making the corrected sentence: 'John Lewis was a congressman and a civil rights activist.'
Step-by-step explanation:
In the sentence, "John Lewis was a Congressman and a civil rights activist," there is a requirement for a grammatical correction.
The term Congressman should be changed to lowercase, as it is not a proper noun in this context. However, the phrase civil rights is correctly written in lowercase since it is not the formal name of a specific legislation or a unique movement but rather a general term. Therefore, the correct answer to what should be changed is A. Change Congressman to congressman.