How do clastic sedimentary rocks form?

lava cools and hardens into rock.

plant and animal remains are squeezed and cemented together.

solid chemicals in water harden and form rocks.

fragments of rock are squeezed and cemented together.

If the sediment is buried deeply, it becomes compacted and cemented, forming sedimentary rock. Clastic sedimentary rocks may have particles ranging in size from microscopic clay to huge boulders. Their names are based on their clast or grain size. The smallest grains are called clay, then silt, then sand.
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The answer is d fragments of rocks are squeezed and cemented together