Which of the following pattern features a client that needs a service from a supplier,but there is some problem with the supplier providing theservice directly to the client?

Which of the following pattern features a client that needs a service

1.	Which of the following pattern features a client that needs a service from a supplier,but there is some problem with the supplier providing the service directly to the client?
A.	Broker
B.	Iterator
C.	Generator
D.	Reactor
Answer» B. Iterator