If you accept either C or D as the correct revision then you have to accept both of them. Hence the best way to treat the sentence is to ignore both of them.
B is not correct either. You can over punctuate.
That leaves A.
Sometimes the right answer to many things is to do nothing. My dad used to say "Don't fix what isn't broke."
A is the answer <<<<<
Answer:
a stereotype is an over-generalized belief about a particular category of people. It is an expectation that people might have about every person of a particular group.
Repetition: Allows the audience to understand the message of the text because it is repeated.
Answer:
third sentence for sure because the commas and punctuation are all in place with the question mark obviously
