WayToGrow Inc is one of the most popular brands of toys in its home market

The company decides to expand its business abroad and its board of directors feel that instead of trying to establish its presence all at once in multiple markets, it is better to expand one country at a time. This would limit their risk and allow them to analyze customer response, after which they could expand to other similar countries. WayToGrow is following a ________ approach.
A) shotgun
B) continuous
C) born global
D) sprinkler
E) waterfall

E) waterfall