In Revolutionary Tea, what does the phrase bouncing girl tell readers about how

C: "Times Change" is a song about the effects of the Vietnam War.

This is the right way to capitalize the words in the sentence ""times change" is a song about the effects of the vietnam war."

Explanation:

Capitalization means the “first” letter of the word as capital and the rest of the word would be in lowercase. First letter of the first word of the sentence should be capital. Proper nouns, names, company names, historical periods must be in capital as it denotes something significant. The main reason for capitalizing words is to focus attention on the certain elements in a sentence.  

In the given sentence, “Vietnam War” is the historical war so, ‘V’ and ‘W’ should be in capital. Similarly, with the song name. “Times Change” is the song name, so it is in capital. Thus, correct option is Option C.