Answer:The sentence that describes a contract comprehensively is the last option - a contract includes an offer, acceptance, consideration, and a legal purpose.
These four terms are all very important parts of a contract, without which an agreement couldn't even exist. A contract has to have all four parts in order to be legally valid, so this is the reason why the other options cannot be correct as all of them lack one or more terms.
This is configured on the BIOS Setup. During computer start-up usually for windows system this can be accessed via pressing on ESC or Function keys on immediate start up.
