Points of Concern When Using Reagent Strips for Urine Chemical

Points of concern when using reagent strips for urine chemical testing include (check all that apply)
i. the time urine is in contact with reagent pads
ii. removal of excess urine off the reagent pads
iii. correctly comparing color changes of reagent pads
iv. time of day the specimen was collected

A) i, ii, and iii
B) i, iii, and iv
C) ii, iii, and iv
D) i, ii, and iv