For Low-Mass Main-Sequence Stars in Hydrostatic Equilibrium, at Any Interior

Multiple Choice

For low-mass main-sequence stars in hydrostatic equilibrium, at any interior radius there exists a balance between the downward gravitational force at that radius and:

A) the pressure from a degenerate electron core
B) the convective force of material rising from the interior
C) the energy released from fusion reactions in the core
D) the outward gas pressure from the material inside that radius
E) the energy released by fusion reactions in a shell surrounding the degenerate core