Select Which Treatment Duration Is Appropriate for the Given Heating

Select which treatment duration is appropriate for the given heating agent.

A) Moist hot pack to increase blood flow in subacute thigh strain, no less than 45 minutes
B) Fluidotherapy to achieve "vigorous" heating of the hand, 5 minutes
C) Air-activated heat wrap for acute back pain, 4 to 8 hours
D) Paraffin bath "dip and reimmerse" to increase collagen extensibility, 3 minutes after creating wax glove