What is an option?

This describes a type of escalation clause rather than an option. An escalation clause specifically pertains to increasing a bid in competitive scenarios, whereas an option provides a right to act without obligation, which does not inherently involve automatic increases.

This definition corresponds to a counteroffer, which indeed alters the terms of the initial offer and signifies a rejection of that offer. However, it does not align with the concept of an option, which allows a party to choose whether or not to act rather than modifying the original terms.

This describes an amendment or addendum, which changes the terms of a contract post-signing. While relevant in contract discussions, it does not encapsulate the essence of an option, which is about granting rights without obligation within a specified time before a contract is finalized.