Because plate movements have raised ancient sea floors above sea level, a. there is less coral than there used to be. b. coral reefs are only found in the deep ocean. c. limestone that began as coral reefs can be found on the continents. d. all remains of ancient coral reefs have been lost

c. limestone that began as coral reefs can be found on the continents.

Explanation:

Limestone formation dates back to the time when oceans covered the earth surface. The shells and skeleton of dead organisms of ocean were the sources of limestone at the bottom of oceans. However, the event of uplift of sea floors above the sea level led to availability of limestone on present day land.

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