And effective writer or speaker will adjust his or her language to the audience? true or flase

I think it depends on who the writer/speaker is aiming their words towards; if it is a children's audience, I'm fairly positive that they won't use adult language, and vice versa for adults.

the answer would be true

answer: the first one

explanation:

explicitly is defined as “in a clear and detailed manner, leaving no room for confusion or doubt.” the rest are interpretive and not clearly proven leaving in fact possible “confusion or doubt” which explicitly, by definition cannot have.