Q8

Given that $z$ is a complex number such that $\operatorname{Re}(z)\ne0$, which of the following is equivalent to
$\frac{4z\bar z}{(z+\bar z)^2}?$

A. $1+\left(\frac{\operatorname{Im}(z)}{\operatorname{Re}(z)}\right)^2$
B. $4(\operatorname{Im}(z)\times\operatorname{Re}(z))$
C. $4\left(1+[\operatorname{Im}(z)+\operatorname{Re}(z)]^2\right)$
D. $\displaystyle\frac{2\operatorname{Im}(z)}{[\operatorname{Re}(z)]^2}$