Final answer:
When using reagent strips to test urine, it is important to follow the instructions, ensure the strip is fresh, and dip the strip directly into the urine sample.
Step-by-step explanation:
The correct answer is D) Hold the strip in the urine for several minutes. When using reagent strips to test urine, it is important to follow the instructions on the test strip package, ensure the test strip is fresh and not expired, and dip the strip directly into the urine sample.
However, holding the strip in the urine for several minutes is not necessary and can lead to false results.