To Make Jury Service Less Burdensome, the One Day or One

To make jury service less burdensome, the one day or one trial system is used in many areas. It means that:

A) every trial lasts one day.
B) jurors are picked for each day of the trial separately.
C) jurors selected for jury duty participate in as many trials as can be held in one day.
D) for jurors who are selected, the jury duty will be over after the trial ends, and for the dismissed jurors, the jury duty is over.