(2013·高考陕西卷)The children________lost in the woods；otherwise，they would have been at the lakeside camp as scheduled.

A．must have got

B．must get

C．should have got

D．should get

统计从业资格认定和涉外调查机构资格认定在性质上属于依法赋予行政相对方从事统计工作和涉外调查工作的法律资格的行政行为。