When people read writings from the early days of America it becomes clear that the English language ...

A) is more flexible and interesting today than in early American writings ...

B) has more figurative expressions today than in early America

C) that the language is constant and unchanging.

D) the English language is constantly changing and evolving

The correct answer is that "When people read writings from the early days of America it becomes clear that D) the English language is constantly changing and evolving.

Explanation:

English language, like every other language in use, is constantly evolving due to several factors like sociocultural changes - think about new words to talk about technological developments - contact with other cultures and languages and adapting their words, etc. Some words and expressions might become outdated and we stop using them.

D) the English language is constantly changing and evolving