The answer D. Trustworthy because a credible source cannot be biased, useless or persuasive if doing research foe an essay.
I would say try to learn it every time also always test yourself, for a student and a adult teaching try to get the student happy because it the student is upset they won't get anywere. Hopefully that helps you ❤
It means no to cross the line. I hope this helps you :]
