The children,____ had played the whole day long, were worn out.

A．all of what

B．all of which

C．all of them

D．all of whom

采用永续盘存制，平时对财产物资账簿的登记方法应该是（）

A.只登记增加，不登记减少

B.只登记增加，随时倒挤算出减少

C.只登记增加，月末倒挤算出减少

D.既登记增加，又登记减少