A Patient's Thyroid Gland Is to Be Exposed to an Average

A patient's thyroid gland is to be exposed to an average of 5.5 μCi for 16 days as an ingested sample of iodine-131 decays. If the energy of the β radiation is 9.7 × 10^-14 J and the mass of the thyroid is 32.0 g, what is the dose received by the patient?

A) 0.027 rads
B) 1.2 rads
C) 37 rads
D) 85 rads
E) None of these choices are correct.