When you get to the end of the tunnel on your way to the B/C concourses, make sure you READ the signs and go up the proper set of escalators. IF you happen to go up the wrong ones, it's not a big deal, but it will slow you down.

There are two sets. The ones furthest to the right will take you to gates C1-7 and the rest of them will take you to the B concourse and C8-43. C1-7 are on the ground floor and the rest are one level up. IF you happen to end up in the C1-7 area, there is another set of escalators that will take you to the proper level.

I always see people taking the wrong set and then they get frustrated, especially if they're in a rush.

Happy travels...