Answer:
C. sedimentary
Step-by-step explanation:
The rock labeled "A" is a sedimentary rock. About 75 % of the Earth's surface is covered by sedimentary rocks. As a result of weathering sediments are formed. These sediments are transported and deposited by wind and water. The loose sediments then compressed and hardened to form sedimentary rocks. Examples of sedimentary rocks are sandstones.