In which sentence could optional replace the underlined word?

Which option best characterizes the pardon-seller?

Mr. culpepper has disdain for his students and does not respect them. mr. culpepper is trying to create a supportive environment for his students. mr. culpepper does not know his students and does not try to know them. mr. culpepper wants to his students but does not know how to do it.

It's to know your purpose before you read something because a purpose can: