单项选择题
A.先付等额租金=后付等额租金×(1+租赁折现率) B.后付等额租金=先付等额租金×(1+租赁折现率) C.先付等额租金=后付等额租金×(1-租赁折现率) D.后付等额租金=先付等额租金×(1-租赁折现率)