Note that B’s cut is not directly across the field. Rather it is diagonal to take them downfield. This makes it far easier to get continuation out.
C needs to time continuation cuts appropriately; see Timing Cuts.
It's possible to run this with the cutter starting on the break side; often seen in a sideline situation where the defence isn't honest and allowing the reset to get open directly behind the disc
By cutting later the defender on the dump cutter will be forced to recognize that you still have lots of yards to cut into with your defender on the wrong side of you. The mark on the dump now must choose to sprint over and help neutralize the breakside space or not. Additionally, if they do this they are opening up a give and go opportunity with the thrower (the person they should be guarding) and their dump. If they don’t, then you’ll be thrown to in to the break lane. If they do, then by holding off your cut a little, now you have created an inside lane for your teammate to throw to. You always want to give your throwers two options! That is true for any cut.
If the thrower can’t get the disc to the continuation cutter around or inside, they turn back to the dump, who is now on the openside and set up 45 degrees back, and run a Dump & Go or start a new dump set.
Keys to making this work are when the disc is moving in the back field towards the breakside, the new dump needs to set up quickly in their openside position (45 degrees back) so that the give and go option is readily available. Some verbiage I used at the clinic for the front of the stack cut was to not start your cut from the front of the stack on the breakside plane of your teammate and their defender. These three cuts should go together seamlessly if ran correctly.