Final answer:
Sedimentary rocks are the most common rock type found within the Earth's entire crust.
Step-by-step explanation:
True. Sedimentary rocks are indeed the most common rock type found within the Earth's entire crust. They are formed from the accumulation and compaction of sediments, such as sand, clay, and organic remains, over long periods of time. Examples of sedimentary rocks include sandstone, shale, and limestone.