Question

Which of the items below is the whole main clause in the following sentence : I had to cancel the class because it was snowing too hard.
A. it was snowing
B. because it was snowing too hard
C. had to cancel
D. I had to cancel the class

Answer 1

The main clause is D. I had to cancel the class

This is a clause that carries the main point and can stand on its own. "Because it was snowing too hard" is a further description of the reasons as to why the classes were cancelled.