What is the standard serialization delay goal to ensure low delay and jilter for voice packets?

What is the standard serialization delay goal to ensure low delay and jilter for voice packets?

A.
20-25ms

B.
10-15ms

C.
15-20ms

D.
25-30ms

Explanation:
Reference: “Ip Telephony Self-Study / Cisco Ip Telephony Flash Cards”, page. 167.