Active continental margins are characterized by which of the following? A. No sediment accumulation B. Sparse earthquake activity C. Shallow coastal waters D. Deep-sea trenches E. Broad continental shelves

C) Deep-sea trenches

Explanation:

There are two types of the Continental plate margins as the active and the passive and the active margins are those associated lithosphere plate boundaries and these are a transform margins and high tectonic activity zones that include the volcanoes and the earthquakes.

they are known to reach a speed of 21 miles per hour