Match the Function with the Graph That Best Describes the Situation

Multiple Choice

Match the function with the graph that best describes the situation.
-The concentration C (arbitrary units) of a certain drug in a patient's bloodstream can be modeled using $$C ( t ) = \frac { t } { ( 0.423 t + 2.366 ) ^ { 2 } }$$ where t is the number of hours since a 500 milligram oral dose was administered. Using the TABLE feature of a graphing utility, find the time at which the concentration of the drug is greatest. Round
To the nearest tenth of an hour.

A) 5.6 hours
B) 6.4 hours
C) 7.1 hours
D) 7.9 hours