What is the difference between a pool and a dynamic pool?

A.
A pool contains fault-tolerant agents while a dynamic pool contains dynamic agents.
B.
A pool contains a fixed list of agents while a dynamic pool can contain requirements.
C.
A pool needs a Workload Broker server to be available in the environment while a dynamic pool
does not.
D.
A pool does not need a Workload Broker server to be available in the environment while a
dynamic pool does.