Why did Preston Brooks attack Charles Sumner with a cane on the Senate floor? A.Sumner

Why did Preston Brooks attack Charles Sumner with a cane on the Senate floor?

A.Sumner had insulted Brooks’s elderly uncle in a vitriolic speech against proslavery advocates.

B.Brooks mistakenly believed that Sumner had spread a malicious rumor about his wife.

C.Sumner had suggested that abolitionists such as Brooks were thieves and hypocrites.