If Jupiter's Radius Is Contracting at a Rate of 2

Multiple Choice

If Jupiter's radius is contracting at a rate of 2 cm/yr it would explain

A) differential convection that powers Jupiter's Great Red Spot.
B) Jupiter's rotation rate slowing with time.
C) Jupiter's shape being oblate.
D) Jupiter radiating more heat than it receives from the Sun.
E) Jupiter's orbit around the Sun getting smaller.