The answer is, "Subordinate clause."
A subordinate clause is also known as a dependent clause, which is the opposite of an independent clause. An independent clause is a part of a sentence that can stand on its own and can still technically be a valid sentence. A dependent clause depends on the main clause to form a complete sentence.
So do you just need to write which one is short and which is long?!
The answer to get it right is b hehehehe
