A copper rod of diameter $25$ $mm$ has a Young's modulus of $120$ $GPa$. It supports an axial load that causes its length to change from $730.0$ $mm$ to $729.5$ $mm$. The axial load is :

A. $40.4$ $kN$
B. $5.80$ $kN$
C. $64.0$ $kN$
D. $110.$ $kN$