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Which of the following is an example of an action/reaction force pair according to Newton's 3 Law?
a. An object can float in water because of the buoyant force. The reaction force is the object pulling the water up .
b. A skydiver falls due to the earth's gravity. There is a drag force opposite the direction the skydiver is falling, and the reaction force is the skydiver pushing against the air.
c. A crate is held up by a rope. Tension is a force that pulls the crate up, and tension pulls down on the rope.
d. A box resting on a table top is pulled down by gravity and the reaction force is that it is held up by the normal force.