A C
Ummm... try rolling off the throttle. You are only in a vortex because the rotor system is developing thrust, trying to push air from above into airflow coming up from below.
Go into auto, you fall through all the vortex and emerge into clean air, roll on throttle, with forward airspeed, and hopefully fly away.
Surely you mean lower collective and maintain throttle RPM? Rolling off throttle would loose RRPM if in VRS???