EIGRP Supports Internal and External Routes

EIGRP supports internal and external routes. Which router should be configured as EIGRP stub routers while deploying EIGRP on a network?

A) routers on the border of the EIGRP stub area
B) routers never used to transit traffic between their neighboring upstream routers
C) routers within the core of the network
D) routers that do not need to originate any type of route into the autonomous system