Carlos Owns a Store in Polk County

Carlos owns a store in Polk County. His trade extends throughout River City, but not beyond the county limits. He sells his store to Virginia and, as part of the transaction, agrees not to engage in the same business anywhere within the state for a period of four years. The agreement:

A) is reasonable.
B) is unreasonable.
C) unduly interferes with the interests of the public.
D) Two of these.