A Charged Metal Ball of Mass,m Hangs from a String

Multiple Choice

A charged metal ball of mass,m hangs from a string.An electric field of 15,000 N/C,pointing to the right,is then turned on.After the electric field is turned on,the ball hangs at a 20 degree angle away from the vertical.If the charge on the ball is 6.1 * 10^-6 C,what is the tension in the string?

A) 0.238 N
B) 0.279 N
C) 0.303 N
D) 0.268 N
E) 0.291 N