A. satellites thatis a part of 15 years effort of subjecting the interactions of Earth's atmosphere, oceans, and land surfaces
B. satellites, whichis 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.
...
B. satellites, whichis 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.
...
