Which of these sentences contains an adverbial clause?
• A. He told me where I could get some coffee.
• B. What she pointed out is very significant in these times.
c. I do not know how to invest my money.
• D. Most animals thrive where they can find food easily.
C. I do not know how to invest my money.
The sentence that contains an adverbial clause is:
C. I do not know how to invest my money.