Two sets of molecules are mixed into a system at time zero. After 10 seconds, equilibrium has been reached. At what time was the entropy of the system maximal?

A. 10 seconds equilibrium
B. 5 seconds all the time it takes to reach equilibrium.
C. Immediately upon ming of the two sets of molecules
D. Prior to mhuing of the two sets of molecules
E. The intormation given is not suficient to pinpoint the time,