问题

Put the following events_______ according to the time when they happened and then putthem______ oftheir importance in history[ ]
A: in order; in order
B: in the order; in an order
C: in an order; in order
D: in order; in order
B: in the order; in an order
C: in an order; in order
D: in order; in order
正确答案是: