Which one is right in the following problems

1. the ice caps of Mars are made of _______ ice
A Water
B Carbon dioxide
C water and carbon dioxide
D methane
E there are no ice caps on Mars

2. How does the moon compare with earth approximately in size and mass?
A same size and mass
B Half the size and half the mass
C 1/4 the size and 1/4 the mass
D 1/4 the size and 1/80 the mass
E 1/80 the size and 1/80 the mass

3. The lunar maria are
A The lava plains of the lunar lowlands
B the smooth plateaus of the lunar highlands
C less than one billion years old
D moving plates of lunar crust
E older than the lunar highlands

1) C

2) D

3) A

1. C

2. D

3. A