Why Would the High Solubility and Short Duration of Action

Why would the high solubility and short duration of action in barbiturates be beneficial for treating sleep disorders?

A) High solubility allows for the drug to be eliminated quickly,getting it out of the system so that the side effect of grogginess in the morning is reduced.
B) Barbiturates will have an increased absorption,resulting in less grogginess in the morning.
C) The short duration of action allows for less chance of tolerance and dependence.
D) High solubility allows for a person to fall asleep faster,and the short duration of action allows for less time necessary needed for the REM stage of sleep.