In "The deadliest tsunami in history," survivors of the tsunami recognized that a receding ocean

A. was a sign of danger
B. left pollution on shore
C. let boats and fish stranded on shore
D signals a coming earthquake

D. signals a coming earthquake

The correct answer is A. was a sign of danger.

To find the answer to this question, we need to analyze the information provided in the statement "The deadliest tsunami in history."

The statement suggests that there is a correlation between a receding ocean and a deadly tsunami. To understand the significance of a receding ocean, it is helpful to know that a tsunami is a series of ocean waves caused by a large displacement of water, usually resulting from an earthquake or undersea volcanic eruption.

Survivors of the deadliest tsunami in history, who witnessed the receding ocean before the tsunami hit, were able to recognize this phenomenon as a sign of danger.

Therefore, the correct answer is A. A receding ocean was a sign of danger.