Answer:
C. Comma splice
Step-by-step explanation:
The sentence contains a comma splice. Two independent clauses are joined together by a comma.
You can fix a comma splice by adding a coordinating conjunction to the sentence: "Your imagination is running away with you, for there are no squirrels in the attic."
Another way to fix a comma splice is by changing the comma into a period, semicolon, or even an exclamation point!
Hope I helped!