Full Idea
The B-series theorist is a realist about time but an idealist about the passage of time. This is the Static Theory of time.
Gist of Idea
The B-series is realist about time, but idealist about its passage
Source
Adrian Bardon (Brief History of the Philosophy of Time [2013], 4 'Reasons')
Book Reference
Bardon,Adrian: 'Brief History of the Philosophy of Time' [OUP 2013], p.82
A Reaction
Note the both A and B are realists about time, and thus deny both the relationist and the idealist view.