The correct answer is D. The modernist era took place in the 1800 and 1900's, and authors were heavily influenced by events such as World War I and the Great Depression. These things gave many people pessimistic views on the world.
In titles, the words that are not typically capitalized are (A.) articles.
<u>Although there are different style guides that indicate how to write titles, most of them coincide that articles should not be capitalized, unless an article is the first word in a title</u>. An article is a word that is used before a noun to indicate if the noun refers to a specific entity or an unspecific one. There are indefinite articles (a/an) and a definite article (the) and they can be used with singular and plural nouns.
“As Atticus tells Jem and Scout, a mockingbird does no harm and makes music for people to enjoy. Tom Robinson is like a symbolic mockingbird because of his innocence; he has not harmed anyone and is an admirable character who offers help to others. Because Tom is not guilty, it makes it "sinful" to harm him.”