A Particle Might Be Placed

Multiple Choice

A particle might be placed
1) inside a uniform spherical shell of mass M, but not at the center
2) inside a uniform spherical shell of mass M, at the center
3) outside a uniform spherical shell of mass M, a distance r from the center
4) outside a uniform solid sphere of mass M, a distance 2r from the center
Rank these situations according to the magnitude of the gravitational force on the particle, least to greatest.

A) All tie
B) 1, 2, 3, 4
C) 1 and 2 tie, then 3 and 4 tie
D) 1 and 2 tie, then 3, then 4
E) 1 and 2 tie, then 4, then 3