Not really. Method C could be anything from treating Problem A with a nameless chemical they've mixed up in a vial to exposing it to a specific gadget they've built that works by SCIENCE to knowing that standing still means you can't be seen by the ProblemAsaurus Rex. You could just as easily say that the portal over there can be closed if they get to the controls and reverse the polarity of the neutron flow.

Doesn't matter how it works, just that it does for the sake of the plot and it feels smart for the sake of characterization.