I need help for this question the I don’t get

12. why do you think that using a conversational tone with plain language when writing businesses messages is a good idea?

Witch sentence contain an adverb clause

Cooper used examples from classical literature and history in her essay because she wanted to show that she was educated she wanted to show that women could do great things she wanted to prove that the classics were still important she wanted to prove that education should include the study of the classics