Which line from "Educate Yourself" by Marcus Garvey is a fact?

A. "Your language being English you should study the English language thoroughly."
B. "There is no use reading a page or paragraph of a book or even a sentence without understanding it."
C. "If you are sitting down waiting for somebody, have something in your pocket to read until the person comes."
D. "He knew the different parts of speech, he could paraphrase, analyze and construct sentences."