Final answer:
A student must present a test card, patient serum sample, and reagent before taking the road test.
Step-by-step explanation:
Required Items for a Road Test:
Before taking the road test, a student must present three key items to their instructor. These items are a test card, a patient serum sample, and a bottle of test reagent, which is typically a suspension of horse erythrocytes. The test card is likely used to record and validate the student’s identity and eligibility for the test, the patient serum sample is the subject of the test, and the reagent is the substance used to react with the serum during the test.