the glistening snow cover the streets after the snowstorm in New England.
First, you find the simple subject and simple predicate.
If the '-ing' form of the verb is not part of the simple predicate, then determine how it is used in the sentence. If it's in a noun position, then it's a gerund. If it is used as an adjective, then it will be a participle.
The rain inspired Carli to paint a picture of delicate roses, swirls of water, and jagged lighting bolts.
C.
It seems to be the most fitting answer.
