Which of the Following Correctly Describes How the Process of Gravitational

Multiple Choice

Which of the following correctly describes how the process of gravitational contraction can make a star hot?

A) When a star contracts in size, gravitational potential energy is converted to thermal energy.
B) Gravitational contraction involves nuclear fusion, which generates a lot of heat.
C) Heat is generated when gravity contracts because gravity is an inverse square law force.
D) Gravitational contraction involves the generation of heat by chemical reactions, much like the burning of coal.