A simple beam has a cable with force $\text{'}P\text{'}$ anchored at $B$ and passing over a pulley at $E$ The bending moment at just left of $C$ is $1\mathrm{.}8$ kNm $.$ The cable force $P$ is:

$($a$)2$ kN

$($b$)3$ kN

$($c$)4$ kN

$($d$)5$ kN