During World War II, part of the U.S. strategy for defeating Japan was called "island hopping." Why was it called this?

Question

A.
The U.S. invasion of Japan began with the country's southern islands and moved north.
B.
The U.S. Navy moved across the Pacific Ocean toward Japan by capturing one island at a time.
C.
The U.S. invasion of Japan began with the country's northern islands and moved south.
D.
The U.S. Navy invaded Japan after sailing past Pacific Ocean islands occupied by the Japanese.

Answer 1

B. The U.S. Navy moved across the Pacific Ocean toward Japan by capturing one island at a time.