Wires, One Copper and the Other Steel, of Equal Length $E _ { s } = 210 \mathrm { GPa } \text { and } E _ { c } = 120 \mathrm { GPa } .$

wires, one copper and the other steel, of equal length stretch the same amount under an applied load P. The moduli of elasticity for each is $E _ { s } = 210 \mathrm { GPa } \text { and } E _ { c } = 120 \mathrm { GPa } .$ GPa. The ratio of the diameter of the copper Wire to that of the steel wire is approximately:

A) 1.00
B) 1.08
C) 1.19
D) 1.32