Which of the Following Is Not a True Statement

Multiple Choice

Which of the following is not a true statement?

A) If you visit the Grand Canyon, the principle of superposition confirms that the deepest rocks in the canyon are older than layers of the canyon walls
B) If you visit the Grand Canyon, the rock record has a continuous set of sedimentary layers from the bottom to the top
C) An unconformity can occur because erosion removed some rock layers before younger layers accumulated
D) An unconformity can occur because no sediment was deposited for a period of time