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C - 25.5 W
Class 4 can only be used by IEEE 802.3at (Type 2) devices, requiring valid Class 2 and Mark 2 currents for the power up stages. An 802.3af device presenting a class 4 current is considered non-compliant and, instead, will be treated as a Class 0 device.
https://www.flukenetworks.com/blog/cabling-chronicles/type-3-and-type-4-are-here
Answer is B
802.11ac APs is to provide power using 802.3at (sometimes called “PoE plus”), a newer power standard that provides up to 25.5 watts at the end of a full-length Ethernet cable
https://en.wikipedia.org/wiki/Power_over_Ethernet#Powering_devices
WHen it says Recieved PD (Powered Device) is assimed. the table in the Wiki calls this initial Wattage out.
30W is negotiated MAX (one would think).
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