Twenty-two feet long and 10 feet in diameter, the AM-1 is one of the many new satellites

that is a part of 15 years effort of subjecting the interactions of Earth’s atmosphere,

oceans, and land surfaces to detailed scrutiny from space.

A. satellites that is a part of 15 years effort of subjecting the interactions of Earth’s

atmosphere, oceans, and land surfaces

B. satellites, which is a part of a 15-year effort to subject how Earth’s atmosphere,

oceans, and land surfaces interact

C. satellites, part of 15 years effort of subjecting how Earth’s atmosphere, oceans,

and land surfaces are interacting

D. satellites that are part of an effort for 15 years that has subjected the interactions

of Earth’s atmosphere, oceans, and land surfaces

E. satellites that are part of a 15-year effort to subject the interactions of Earth’s

atmosphere, ocean, and land surfaces

B的意思上有些问题，说AM-1是 a part of a 15-year effort to subject 和原来句子意思不一致

固定用法是subject sth to...B用了个名词性从句，感觉罗嗦，读的累