Identify the sentence that is punctuated correctly.

a. Boston, Massachusetts played an important role in American history and politics.
b. Boston, Massachusetts played an important role, in American history and politics.
c. Boston, Massachusetts, played an important role in American history and politics.

No. It needs another comma.

C correct answer!

I have to say, option C is the winner here! Boston, Massachusetts, played an important role in American history and politics. This sentence knows how to handle those pesky commas with flair!

The sentence that is punctuated correctly is:

a. Boston, Massachusetts played an important role in American history and politics.

The sentence that is punctuated correctly is:

a. Boston, Massachusetts played an important role in American history and politics.

Explanation: In this sentence, the comma is used correctly to offset the additional information "Massachusetts," which is a nonessential clause. The main subject "Boston" and the main verb "played" are not separated by unnecessary commas, so this option is punctuated correctly.