Which of the following has a side split that allows a number of cable groups to be separated and tucked within it?

A.
Split tubing.

B.
A cable organizer.

C.
Cable ties and cable clips.

D.
All of the above.

Explanation:
Split tubing has a side split that allows a number of cable groups to be separated and then tucked within.
Incorrect
Answers:
B: A cable organizer is a box that can be used to wrap and tuck cables inside it. Cable organizers are usually mounted on the server room wall to assist in organizing cables.
C: Cable ties and cable clips can be used to organize cables into bundles. Cable ties and cable clips come in different colors and lengths. Using cable ties and cable clips is the most cost-effective way in which to organize cables.
D: Split tubing is the correct answer.
References:

Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 456-457.