Recall the Application About Rory McIlroy and Weed-Whacking to Answer

Recall the Application about Rory McIlroy and weed-whacking to answer the following question(s) . The Application assumes that Rory McIlroy could whack down all the weeds on his estate in one hour at an opportunity cost of $1,000, but it would take 20 hours for a gardener to do it at a price of $10 per hour.
-Based on the assumptions in the Application, should Rory hire a gardener or cut the weeds himself?

A) He should hire the gardener because he would save $1,000.
B) He should hire the gardener because he would save $800.
C) He should cut the weeds himself because he would save $200.
D) He should cut the weeds himself because he would save $1,000.