Ais an agreement between two or more people or parties.
a.
contract
b.
security
c.
dialogue
d.
monopoly

Option A is the correct answer,contract.

Explanation:

For an agreement to be viewed as a valid contract,there must be an offer by a party to the contract and an acceptance by another party.

Also,consideration is another element of a contract,which is the reward offered by the one of the parties to the other in return for something of value.

In addition,the parties to the contract must be capable to enter into the contract, in other words,they must  adults recognized by law not minors or children.

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