Sasha uses a basketball and a tennis ball to represent two astronomical bodies based on their sizes.

Which of the following representations is the most correct based on what Sasha has? (5 points)

a
The basketball represents Earth and the tennis ball represents the solar system.

b
The basketball represents the moon and the tennis ball represents the solar system.

c
The basketball represents the solar system and the tennis ball represents Earth.

d
The basketball represents the solar system and the tennis ball represents the Milky Way.