QUESTION $18$

Cellphones & Calltime, Inc., makes an offer to Delores to enter into a contract to work as a salesperson for a certain base salary plus commission for ninety days subject to a one$-$year renewal based on her performance. Delores accepts the offer. A valid contract requires

a$.$ a duration and termination provision.

b$.$ a price and a subject.

C$.$ specific quality standards.

d$.$ an offer and an acceptance.