When no time is specified in the offer, the reasonable time an offer is open:

A mutual mistake concerning a material fact:

A new contract replacing an old one is enforceable:

Is it the plaintiff who has the burden of proving facts adequate to support the allegations in the complaint?

Unjust enrichment:

Unlike the case of an oral contract, when a contract is written, there cannot be a dispute between the parties as to the terms of the agreement.

A valid offer:

A revocation of an offer occurs when:

Government regulation of business:

The purpose of antitrust laws is to: