Question

Authorities in California required drivers to use their headlights on a certain
road during the daytime as well as at night and found that annual accident rates
on the road fell 15 percent from the previous level. They concluded that applying
the daytime rule statewide would lead to a similar reduction in accidents. Which of the following, if true, most strengthens the authorities' argument?

• A. \( \text{Traffic decreased due to an alternate route.} \)
• B. \( \text{Drivers were informed via conspicuous signs.} \)
• C. \( \text{Many drivers use headlights in fog or rain.} \)
• D. \( \text{Headlight bulbs would need more frequent replacement.} \)
• E. \( \text{Test road had varied conditions like statewide.} \)

Hint:

Look for evidence of representative conditions.

Answer 1

Answer: (E)

Step 1: Argument: Daytime headlights reduced accidents 15% on one road.
Step 2: Conclusion assumes statewide effect; needs similar conditions.
Step 3: (E) shows test road represents statewide conditions, strengthening the conclusion.
Step 4: Others (A-D) don’t support applicability.