Answer:

D. all of the above.

just like earth has an ozone layer, so do venus and mars. In fact, mars has three distinct layers, although they are much weaker than the one on earth and vary greatly in location and with time. but ozone is also found on venus and mars, where it is created by non biological means.

almost all water on mars today exists as ice, though it also exists in small quantities as vapor in the atmosphere. abundant water ice is also present beneath the permanent carbon dioxide ice cap at the martian south pole and in the shallow subsurface at more temperate conditions.

and also. mars is about half the diameter of earth, its surface has nearly the same area as earths dry land.