Which of the following could be causing his problems?

Professor Perry Correll has an Ethernet switch that is compliant with 802.3at. He is having problems with his APs randomly rebooting.

Which of the following could be causing his problems?
A . Multiple desktop PoE VoIP telephones are connected to the same Ethernet switch.
B . Most of the Ethernet cables running from the switch to the APs are 90 meters long.
C . The Ethernet cables are only Cat 5e.
D . The switch is capable of 1000BaseT, which is not compatible with the AP.

Answer: A