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

Two 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 $E_{s}=210 \mathrm{GPa} \text { and } E_{c}=120 \mathrm{GPa} .$ . 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) $1.32$