【名词&注释】
灰色收入(grey income)、抵押物(hypothecated property)、工资收入(wage income)、借款人(borrower)
[单选题]办理抵(质)押贷款的借款人(borrower),其第二还款来源或在违约情况下的还款保证指的是()。
A. A、借款人(borrower)的工资收入 B. B、借款人(borrower)的经商收入 C. C、借款人(borrower)的灰色收入 D. D、抵押物或质押物