A 010-M Long Metal Rod Has a Radius of 1 $\Omega$

A 0.10-m long metal rod has a radius of 1.0 cm and a resistance of 3.2 * 10 ^{- 5} $\Omega$ . What is the resistivity of the metal?

A) 5.0 *10 ^{- 8} $\Omega$ .m
B) 160*10 ^{- 8} $\Omega$ .m
C) 10 *10 ^{- 8} $\Omega$ .m
D) 1.6 *10 ^{- 8} $\Omega$ .m