有两根木棒长分别为10cm和18cm，要钉成一个三角形木架，则下列四根木棒应选取（　　）

A．8cm

B．12cm

C．30cm

D．40cm

— I’m afraid I can only make a small contribution this time.

—____.We really appreciate your assistance.

A．The best things come in small packages

B．The more,the better

C．It is better to give than to receive

D．Every little helps