If the Sun’s core suddenly shrank a little bit, what would happen in the Sun

A) The core would cool off and continue to shrink as its density increased.
B) The density of the core would decrease, causing the core to cool off and expand.
C) The core would heat up, causing it to radiate so much energy that it would shrink even more.
D) The core would heat up, fusion rates would increase, and the core would re-expand.