In the Figure,a Ball Hangs by a Very Light String

Multiple Choice

In the figure,a ball hangs by a very light string.What is the minimum speed of the ball at the bottom of its swing (point B) in order for it to reach point A,which is 1.0 m above the bottom of the swing?

A) 2.2 m/s
B) 3.1 m/s
C) 4.4 m/s
D) 4.9 m/s