How does the text describe Pluto?
a
Pluto is made up entirely of ice, and it is bigger than Venus.
b
Pluto is made up entirely of rock and ice, and it is bigger than Earth's moon.
c
Pluto is made up entirely of gas, and it is bigger than Earth's moon.
d
Pluto is made up entirely of rock and ice, and it is smaller than Earth's moon.