Which of the following is a discovery that supports the theory that there was once, or may still be, liquid water on planets oth
er than Earth?
A. Life is present on Saturn and Mars, so therefore water must exist on those planets.
B. Jupiter experiences daily rainfall and has several small rivers.
C. There are river-like channels and rocks with an eroded appearance on Mars
D.
There are large ponds and lakes present on the surface of Mars
