What is a key design aspect to be considered when designing an IP network that will be
carrying real-time VoIP traffic?

A.
Minimizing total bidirectional end-to-end delay to 0-150 ms

B.
Minimizing total unidirectional end-to-end delay to 150-500 ms

C.
Minimizing total bidirectional end-to-end delay to 0-50 ms

D.
Minimizing total unidirectional end-to-end delay to 0-150 ms