How might a contract come to an end by the operation of the contract itself? Which of the following is correct?

Group of answer choices

A contract cannot come to an end unless the parties themselves agree that the contract is now too difficult to conclude

A contract can only end when the contract is actually completed, this is specified by the terms which affect the operation of the company

The contract itself may contain terms which trigger the ending of the contract

Once a party breaches any part of the contract, the agreement will automatically operate to end the contract