Whitening strips are an alternative OTC product for whitening. To achieve the desired results, the strips are to be worn for ____ minutes a day
a. 10
b. 30
c. 15
d. 20
b
RATIONALE: Whitening strips are an alternative OTC product for whitening. To achieve the desired results, the strips are to be worn for 30 minutes a day.
Health Professions
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What will be an ideal response?
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What will be an ideal response?
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