GWD6-Q39

GWD6-Q39:

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.

1. satellites that is a part
        of 15 years effort of subjecting the interactions of Earth’s atmosphere,
        oceans, and land surfaces
2. satellites, which is a part
        of a 15-year effort to subject how Earth’s atmosphere, oceans, and land
        surfaces interact
3. satellites, part of 15
        years effort of subjecting how Earth’s atmosphere, oceans, and land
        surfaces are interacting
4. satellites that are part of
        an effort for 15 years that has subjected the interactions of Earth’s
        atmosphere, oceans, and land surfaces
5. satellites that are part of
        a 15-year effort to subject the interactions of Earth’s atmosphere, ocean,
        and land surfaces