Charlie promises to perform, for a price, restoration of woodwind instruments in affiliation with Blue Note, a music store. To support a contract, the consideration ex- changed by the parties must be

a. adequately polite.

b. equally valuable.

c. legally sufficient.

d. wisely priced.

20. Ernie agrees to sell his gardening business to Oscar. As part of the sale price, Ernie promises (to which Oscar agrees) not to solicit his former clients, as long as they live within a 3-mile radius of the business's base, for gardening work over the next 2 years. If he adheres to this restriction, he will get a payment of $10,000. This promise is most likely

a. invalid because it is part of a sale of an ongoing business.

b. invalid because of the unreasonable terms of area and time.

c. valid because it is part of a sale of an ongoing business, and the restrictions are not unreasonable.

d. valid only if both parties shake on the deal.