The Choices Below Describe Four Hypothetical Planets

The choices below describe four hypothetical planets.Which one would you expect to have the hottest interior? (Assume the planets orbit a star just like the Sun and that they are all the same age as the planets in our solar system. )

A) Size: same as the Moon.Distance from Sun: same as Mars.Rotation rate: once every 10 days.
B) Size: twice as big as Earth.Distance from Sun: same as Mercury.Rotation rate: once every 6 months.
C) Size: same as Mars.Distance from Sun: same as Earth.Rotation rate: once every 18 hours.
D) Size: same as Venus.Distance from Sun: same as Mars.Rotation rate: once every 25 hours.