In the first read reality tv shows what does the word controversy mean

Which statement would you identify as being correct? a. it is important to learn the etymology of every word in a text. b. it is important to understand the etymology of every word in a text. c. it is important to study the etymology of every word in a text. d. it is important to study the etymology of some words in a text.

Which sentence uses whether correctly

Which statement is correct about the civil rights act of 1964?