Answer:
The correct answer option is D. They are not part of the rock cycle.
Step-by-step explanation:
The rock cycle is the transitional process where the rocks of a particular type change and turn into rocks of another type.
The breaking down of different rocks like igneous andmetamorphic and then the cementation and compaction of these broken rock pieces forms the sedimentary rocks.
Therefore, saying that sedimentary rocks are not a part of the rock cycle would not be true.