Alatan Owns a Building Supply Store in Russ County

Alatan owns a building supply store in Russ County. His trade extends throughout River City, the largest city in Russ County, but not beyond the county limits. He sells his store to Hilary and, as part of the transaction, agrees not to engage in the same business anywhere in River City for a period of two years. In this case:

A) the geographic restraint is reasonable.
B) this agreement is unreasonable.
C) the agreement unduly interferes with the interest of the public.
D) the time limit is reasonable, but the geographic restraint is not.