Read the sentence.

henry david thoreau, often known as the father of environmentalism wrote the book entitled walden.

which revision should be made so that the sentence is properly punctuated?

a. place a dash after “environmentalism”
b. remove the comma after “thoreau”
c. place parentheses around “entitled walden”
d. add a comma after “environmentalism”

D

Explanation: When an identifier describes a unique person or thing and is preceded by “the” or a possessive, use a comma.

D. Add a comma after "environmentalism"

Explanation:

In this case, the whole expression "often known as the father of environmentalism" is a dependent clause, more specifically a nonessential element of the whole sentence, which adds extra information and can be omitted without affecting the meaning of it. So, in this case, it has to be placed between commas.

bad answer your dumb

explanation:

dumb