小明从A处向北偏东72 ^。38'方向走10m到达B处，小亮也从A 处出发向南偏西15 ^。38'方向走15m到达C处，则∠BAC的度数为（     ）度。

The tension on an anchor cable increases so that the angle of the catenary to the seabed at the anchor reaches 10°. How will this affect the anchor in sandy soil?（）

A.It will have no effect

B.It will increase the holding power

C.It will reduce the holding power

D.It will cause the anchor to snag