A ⁹⁹Mo-^99mTc Generator Is Eluted Monday at 7:00 AM, Producing

A ⁹⁹Mo-^99mTc generator is eluted Monday at 7:00 AM, producing 1.8 Ci of ^99mTc in the eluate vial, in 20 ml saline.What volume of eluate should be withdrawn from the eluate vial into a syringe in order to inject a patient with 20 mCi of ^99mTc at 3:00 PM? (Given the half-life of ^99mTc is 6.02 hours.)

A) 0.56 ml
B) 0.66 ml
C) 0.76 ml
D) 0.86 ml