伊拉克与伊朗的战争原因主要是[ ]

A、经济纠纷

B、伊斯兰什叶派和逊尼派有一定的矛盾及领土纠纷

C、水源问题

D、石油纠纷

His mother looks so young. ______ fact, she is ______.

A．At; the forty

B．In; the forties

C．As; forty

D．In; her forties