Consider Earth to be a homogeneous sphere. Scientist $A$ goes deep down in a mine and scientist $B$ goes high up in a balloon. The value of $g$ measured by
- A$A$ goes on decreasing and that by $B$ goes on increasing
- B$B$ goes on decreasing and that by $A$ goes on increasing
- CEach decreases at the same rate
- DEach decreases at different rates
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