Pluto's density is 1.8 g/cm3.This implies that
A) Pluto has a large iron-nickel core.
B) Pluto is about 50% water and 50% rocky material.
C) Pluto should have a magnetic field about one-third as strong as Earth's.
D) Pluto is still geologically active.
E) Pluto probably has a small ring system that hasn't yet been detected.
Correct Answer:
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