What Is Often the First Indication of the Arrival of a Tsunami

Multiple Choice

What is often the first indication of the arrival of a tsunami at the coast?

A) a giant 100-meter-high wave looming on the horizon
B) a sudden rise in sea level to a crest within about 20 seconds
C) a rapid drop in sea level
D) sea turtles running up the beach
E) people running down to the beach to see the action