Common proverbs for many hands make

What is the best way to combine these sentences?

In this excerpt, the characters describe the nature of

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.