Niamh is a 22-year-old patient with a previous forearm laceration presenting with a raised scar that is tender to touch. The therapist would like to use iontophoresis with the appropriate parameters. Which of the following is the MOST recommended for this patient:
A. Dexamethosone with positive polarity
B. Acetic Acid with negative polarity
C. Dexamethosone with negative polarity
D. Acetic Acid with positive polarity
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