What is the maximum fine for a person age 21 or older caught drinking and driving?

Answer: C — $500

The maximum fine for a person age 21 or older caught drinking and driving is indeed $500. This amount reflects the serious nature of the offense, which not only endangers the driver but also poses significant risks to others on the road. Driving under the influence is treated with severe penalties to deter individuals from engaging in such dangerous behavior, and a fine of this amount serves as a significant financial consequence. While the other amounts listed might seem reasonable, they do not accurately reflect the gravity of the offense as prescribed by law. The $500 fine is intended to reinforce the state's commitment to road safety and the importance of responsible driving.