That truck nearly hit me; I _______.

A．might be killed

B．may been killed

C．may be killed

D．might have been killed

甲、乙签订的买卖合同约定甲先供货，货到后10天付款。甲在履行合同过程中发现乙经营状况严重恶化，难以支付该笔货款，遂中止履行合同并拒绝乙的履行要求。甲行使的这种抗辩权属于（）。

A．同时履行抗辩权

B．不安抗辩权

C．先履行抗辩权

D．后履行抗辩权