Answer:
C)her opportunity cost of mowing her lawn is higher than the cost of paying someone to mow it for her.
Explanation:
Opportunity cost is a concept under economics that describes as cost of the benefits that some, investor , couldn't enjoy in the process of selecting his/her alternatives of choices over other choice.
Therefore, in the case of this popular celebrity that is paid highly for her time, she should probably not mow her own lawn because her opportunity cost of mowing her lawn is higher than the cost of paying someone to mow it for her.