Which of the Following Is True Regarding Allergy Skin Tests

Which of the following is true regarding allergy skin tests to detect specific IgE sensitization?

A) Helpful in detecting airborne allergies such as dust and cat dander but not helpful in detecting food allergies
B) Can be done on children of any age
C) Will be more accurate if an antihistamine is taken the morning of the test
D) Will not be useful if child has taken an inhaled corticosteroid in the past 6 hours