When Collecting a Timed Urine Specimen for Laboratory Analysis

When collecting a timed urine specimen for laboratory analysis:

A) all of the urine must be collected at once into one large container instead of using smaller separate containers that are emptied into the large container.
B) the container used for collection must be maintained at room temperature throughout the entire collection period.
C) it is acceptable and best practice to collect the urine into one container containing two different mixed preservatives if more than one test is ordered.
D) the individual's bladder must be emptied first at the beginning of the time of collection,and this urine is discarded.