QUESTION $7$

Which motherboard slot should you install a new high$-$end graphics card in$?$

a$.$ PCI Express $2\mathrm{.}01$ slot

b$.$ PCI slot

c$.$ PCI Express $2\mathrm{.}016$ slot $($PCIE$4$: $x4$ mode$)$

d$.$ PCI Express $3\mathrm{.}016$ slot $($PCIE$2$: $16$ mode$)$