Serena Williams should probably not mow her own lawn because
a. her opportunity cost of mowing her lawn is higher than the cost of paying someone to mow it for her.
b. she has a comparative advantage in mowing her lawn relative to a landscaping service.
c. she has an absolute advantage in mowing her lawn relative to a landscaping service.
d. she might sprain her ankle.
Answer a. her opportunity cost of mowing her lawn is higher than the cost of paying someone to mow it for her.
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