Answer:
B. The assertion and the reason are both correct, but the reason is invalid.
Step-by-step explanation:
In this scenario, both the assertion that Continental slopes around the margin of the Pacific Ocean are greater than the global average slope and the reason that the Pacific Ocean is the world's largest ocean, covering more than half of the ocean surface area on Earth are both CORRECT. Because according to facts and studies, Pacific Ocean is the largest ocean in the world and continental slopes around the margin of the Pacific is greater than global average. But, the REASON IS NOT THE CORRECT EXPLANATION OF THE ASSERTION, HENCE, the reason is INVALID.