help please!! i have finals and i don’t understand!! ILL GIVE BRAINLIEST AND POINTS!!

6. Which bolded clause is an adverb clause?

a. If you want to go on the field trip, you must turn in your permission slip today.

b. I like the sweet dog at the pound.

c. That television show, which is my favorite, is having a marathon tonight.

d. Are you the one who sang the National Anthem for the baseball game?

e. I hope that you will forgive me.