In civil law, Exceptio non amipleti contractus means

A、 one party is entitled to make performance unless the other party performs his obligations according to the contract
B、 one party is entitled to revise performance unless the other party performs his obligations according to the contract
C、 one party is entitled to change performance unless the other party performs his obligations according to the contract
D、 one party is entitled to reject performance unless the other party performs his obligations according to the contract