Which of the following Frame-Relay encapsulation commands would you use, if you had to connect your Cisco router to a non-Cisco router?（）

A、TestKRouter(config-if)# Encapsulation frame-relay dot1q

B、TestKRouter(config-if)# Encapsulation frame-relay aal5snap

C、TestKRouter(config-if)# Encapsulation frame-relay ietf

D、TestKRouter(config-if)# Encapsulation frame-relay isl

E、None of the above