Fisk University (Nashville, Tennessee)
http://rvwolverines.org/common/pages/DisplayFile.aspx?itemId=12209802
What are you even talking about
Answer: option A is the correctly punctuated sentence.
Explanation: “which are the most common type” is a non-restrictive modifying clause. A nonrestrictive modifying clause is a phrase that adds nonessential information to the sentence without altering its meaning, and, therefore, should be in a set of commas.
