Which three restrictions apply to OSPF stub areas? (Choose three.)

A.
No virtual links are allowed.

B.
The area cannot be a backbone area.

C.
Redistribution is not allowed unless the packet is changed to a type 7 packet.

D.
The area has no more than 10 routers.

E.
No Autonomous System Boundary Routers are allowed.

F.
Interarea routes are suppressed.

Explanation:
http://www.juniper.net/techpubs/en_US/junos13.1/topics/concept/ospf-routingunderstanding-ospf-areas-overview.html (see stub areas)