What stress would cause a wire to increase in length by 0.1% if the Young's modulus of the wire is 12 x 10¹⁰Nm⁻²?

a) 1.2 x 10¹⁰
b) 1.2 x 10⁹
c) 1.2 x 10⁸
d) 1.2 x 10⁷