One gram of a drug was given to a patient by IV administration. Shortly after (following quick distribution and before any significant elimination has occurred), its plasma concentration was found to be 0.6 mg/L. The half-life of the drug is 8hrs. The desired Steady State concentration is 1.2 mg/L. How frequently do we need to provide a repeating dose of 1g to reach this desired steady state? 

(A) Every 2 hrs. 

(B) Every 4hrs 

(C) Every 8hrs. 

(D) Every 16 hrs. 

(E) Once a dayn