Final answer:
The amount being administered should be measured in milliliters to ensure the needed accuracy.
Step-by-step explanation:
To ensure accurate dosage administration of a medication within plus/minus 1 percent, the amount being administered should be measured in milliliters (C) to the nearest whole number. Milliliters are a smaller unit of volume measurement compared to deciliters, decaliters, and liters. By using milliliters, the measurement can be more precise and allow for the required accuracy.