公元13世纪，由于印度社会内部的分化和外来宗教伊斯兰教的传入，佛教在印度彻底消亡。( )

Guide tolerances during elevation of the jack-up rig will（）.

A.reduce spud can bearing pressure

B.keep the unit level and reduce overloading

C.reduce stresses on the hull

D.minimize the potential for punch-through