(A) (Other) sessions have no campaign value attached to them.
(B) (Other) sessions have no source value attached to them.
(C) (Other) sessions cannot be categorized in any of the channels in this channel grouping.
(D) Investigate (Other) to see if sessions could be categorized by defining a new channel.
The “Other” in the Channels report indicates sessions from a particular channel that cannot be categorized into any of the default channels defined by Google Analytics. You can analyze and investigate the sessions you get from the “Other” channel to figure out if they can be grouped or categorized into a new channel by defining a new channel yourself.
This question is a part of the Assessment 2 section of the Google Analytics for Power Users course. You can find all the questions from all the four assessments with detailed explanation for this exam in our Google Analytics for Power Users Assessment Answers page.