A 060-Kg Object Is Suspended from the Ceiling at the End

A 0.60-kg object is suspended from the ceiling at the end of a 2.0-m string.When pulled to the side and released,it has a speed of 4.0 m/s at the lowest point of its path.What maximum angle does the string make with the vertical as the object swings up?

A) 61 $\degree$
B) 54 $\degree$
C) 69 $\degree$
D) 77 $\degree$
E) 47 $\degree$