When analyzing how C$3,$ C$4$ and CAM plants differ in terms of Carbon Fixation

C$4$ plants fix CO$2$ by converting PEP $(3$ Carbon compound$)$ to Oxaloacetate $(4$ Carbon compound$)$

CAM plants utilize spatial separation of the cells responsible for Carbon Fixation and the cells that are responsible for sugars through the Calvin$-$Benson Cycle$$

C$3$ plants have RuBisCo that is highly specific to CO$2$ and therefore does not require isolation from O$2$ generated by water splitting and$/$or closing of the leaf stomata$$

Only C$4$ plants utilize PEP $($phosphoenol pyruvate$)$ as the initial $3$ carbon compound that CO$2$ is fixed into

None of the above are true