I feel that the answer would be B. Singing and upbeat song.
D. to convey thoughts and feelings
Formal language is also called "proper language" because it is the type of language you would use when first meeting someone or giving a speech at a high class place so the correct answer is:
<span>B) Have I convinced you that the study of grammar is important and well worth your effort? </span>
Atticus does not pretend to be better than anyone. He is not racist and does not put on airs. He raises his children with the same standards that he raises himself with. Other people in the town make up long lies that they blame on others, using race as a key part.