They ______ friends since they met for the first time.[ ]

A: have made

B: made

C: have been

D: were

从0，1中选一个数字，从2，4，6中选两个数字，组成无重复数字的三位数，其中偶数的个数为（　　）

A．36

B．30

C．24

D．12