Which of the Following Statements Regarding the Use of Phonophoresis

Which of the following statements regarding the use of phonophoresis is most correct?

A) Results from all studies for phonophoretically applied lidocaine clearly show a greater lessening of pain or increased skin analgesia than with any other modality.
B) Results from all studies for phonophoretically applied salicylates clearly show a greater lessening of pain or increased skin analgesia than with any other modality.
C) From the available research evidence, phonophoresis is highly recommended over the many other approaches that are available to treat pain and inflammatory conditions.
D) Results of studies involving the phonophoretic application of hydrocortisone are conflicting, with some studies showing improvement in various conditions while others show little or no effect.