All of the following are steps in the rock cycle of a sedimentary rock

a. weathering

b. compaction

c. deposition

d. lava cooling at the earth's surface

Sedimentary rocks are the product of 1) weathering of preexisting rocks, 2) transport of the weathering products, 3) deposition of the material, followed by 4) compaction, and 5) cementation of the sediment to form a rock. The latter two steps are called lithification.
so D is not involved in sedimentary rocks.

i'd say that the moon rock is about 2.2 billion years old.