Identify the sentence with incorrect punctuation.

A.

I arrived on campus on Friday, this was the beginning of a new journey.
B.

She didn’t have any idea what the lecturer was talking about.
C.

After he entered the residence, the new student looked for his room.
D.

To make a mistake is human; to forgive someone is divine.

A. I arrived on campus on Friday, this was the beginning of a new journey.