QUESTION $15$

Which two statements are true regarding conventional PCI and PCI Express $($PCIe$)$ slots

a$.$ The PCI bus transports $32$ data bits in parallel.

b$.$ The PCIe slots are slightly taller than PCI slots.

c$.$ PCI slots could be used for modern high$-$end graphics cards.

d$.$ The slot form factors are different but compatible.

e$.$ The PCI bus operates at about $500Mbps.$