Question

What is another name for an independent clause?

Answer 1

Another name for independent clause is Main clause so it's C

Answer 2

Salutations!

What is another name for an independent clause? 

An Independent clause is a clause that doesn't need any other clause to conjugate in the sentence. It is mere a simple sentence, with adding a subject and the verb.

He ran is an independent clause.

Another synonym for independent clause is main clause.

Thus, your answer is option C.

Hope I helped :D