A gerund is a verbal that ends in -ing and functions as a noun. The one that contains a gerund functioning as a direct object is D.
B because it is a command
Is a college education worth it?
Is reading better on Kindles or paper books?
What is worldschooling?
What is unschooling?
Why are teachers underpaid?
What is sociology?
You have to capitalize the important words, hope that is what you're looking for.
Man Saves Child's Life
