Three 250 $\mu$ C Charges Are Placed on Tiny Conducting Spheres at the Spheres

Multiple Choice

Three 2.50 $\mu$ C charges are placed on tiny conducting spheres at the ends of 1.00 m-long strings that are connected at 120 $\degree$ angles as shown below.The magnitude,in N,of the tension in any one of the strings is

A) 1.88 * 10 ^{- 2}.
B) 3.25*10 ^{- 2}.
C) 3.75* 10 ^{- 2}.
D) 6.50 *10 ^{- 2}.
E) 7.50*10 ^{- 2}.