A String Attached to an Airborne Kite Is Maintained at an Angle

Multiple Choice

A string attached to an airborne kite is maintained at an angle of 40 $\degree$ with the horizontal.If a total of 120 m of string is reeled in while bringing the kite back to the ground,what is the horizontal displacement of the kite in the process? (Assume the kite string doesn't sag. )

A) 100 m
B) 84 m
C) 77 m
D) 92 m