Which two statements about PCIe are true? (Choose two.)

Which two statements about PCIe are true? (Choose two.)
A .  The PCIe link is built around dedicated unidirectional couples of serial, point-to-point connections known as lanes.
B .  You can install a PCI Express x8 adapter into an x4 slot.
C .  The PCIe standard is a bus-based system in which all the devices share the same bidirectional, 32-bit or 64-bit, parallel signal path.
D .  The PCIe 1.0 standard doubles the transfer rate compared to PCIe 2.0.
E .  A link that is composed of four lanes is called an x4 link.

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Answer: A,E