Suppose the rated capacity of the main engine of a ship is 10,000 KW at 100 rated rpm, then when at 80 rpm its capacity should be （）.

A.are interdependent
B.are not interdependent
C.have nothing to do with each other
D.are independent

A.has kept pace with
B.has kept pace to
C.has made pace with
D.has made pace to

A.The high；the large
B.The higher；the larger
C.The lower；the larger
D.The low ；the large