Which Statement Is True Concerning the Evidence of Intermittent Compression

Which statement is true concerning the evidence of intermittent compression?

A) The efficacy of intermittent compression for increasing venous flow has not been substantiated.
B) The efficacy of intermittent compression for lymphedema is widely accepted.
C) Research has shown that intermittent compression is more effective than compression wrap and elevation for reducing pitting edema.
D) Research on the optimal treatment duration and duty cycle for reducing lymphedema is inconclusive.