Which part of the sentence is a nonrestrictive clause? The college cafeteria
which is free for all full-time faculty
is a popular and safe environment
for students to study.

which is free for all full-time faculty

Explanation:

The non-restrictive clause is the non-essential information added to a sentence after a noun or subject. It provides more description that may not be needed as the information will still make sense without it. In the sentence above, the clause, "which is free for all full-time faculty" provides more information about the college cafeteria but it is not essential as we will still know the additional benefits of the college cafeteria without it. They are usually separated by commas.

im not sure about this one

i think its c

independent