The Chingford branch line is a railway line between Clapton Junction (just west of Clapton station) and Chingford station. Services currently operate between Liverpool Street station and Chingford. The branch is currently part of the Lea Valley Lines network.
Does this next sentence follow, given the preceding text?
Services between Liverpool Street station and Chingford run with trains that are 4 carriages long

Choose from: (A). Yes. (B). It's impossible to say. (C). No.
(B).