1.Your sister,I think,is old enough to know_____to spend all

1.Your sister,I think,is old enough to know_____to spend all her money on fancy food.
A.other than B.rather than
C.more than D.better than
2.Only one out of ten people______to handle the work at hand in the office properly,the rest will be assigned some simple work.
A.has trained
B.have trained
C.have been trained
D.are to be trained