Answer:
The answer is A. I got into the college of my dreams, I’m so thrilled!
Explanation:
When a comma is used to join two independent clauses (groups of words that contain subjects and verbs or predicates, and can stand on their own as complete sentences), and no conjunction (examples: although, and, because, but, nor, or, yet, etc.) is used after the comma, then it creates a comma splice.
There are two independent clauses in the sentence:
—“I got into the college of my dreams”
—“I’m so thrilled”
It not right to join these two independent clauses with a comma, and without a conjuction.