A Drug Containing ( = 6 $\mu$ Ci at the Preparation Time (7:00 Am)

A drug containing ( = 6.05 h) is to be injected into a patient at 10:00 am.You are to prepare the sample 3.00 hours before the injection (at 7:00 am) with an activity of 3.53 $\mu$ Ci at the preparation time (7:00 am) .What will be the activity of the sample at the time of the injection?

A) 1.50 $\mu$ Ci
B) 2.00 $\mu$ Ci
C) 2.50 $\mu$ Ci
D) 3.00 $\mu$ Ci
E) 3.50 $\mu$ Ci