From simple energy method, the estimated evaporation rate $E_r$ from a water surface $($temperature $T=15C)$ that receives a net solar radiation $R_n=300\frac{W}{m^2}$ is $($assume water density $=1000k\frac{g}{m^3})$

A$.0\mathrm{.}122m\frac{m}{?}$ day

B$.1\mathrm{.}22m\frac{m}{h}r$

C$.0\mathrm{.}44m\frac{m}{h}r$

D$.4\mathrm{.}4m\frac{m}{?}$ day