"A. You know, of course, that she used to dive for her college swim team." does not have any errors in comma usage. "Of course" is almost always surrounded by commas.
Answer:
nothing, it a racist and everyone thinks all lives matter which they do but white people care less about black live
Explanation:
To make them feel so much pain that they couldn’t remember or forget, they would just be feeling pain and that’s all they had
