Despite significant government investment in public transportation infrastructure over the past decade, a recent study indicates that the average commuter's travel time has actually increased by 15%. This suggests that the investments have not achieved their intended goal of reducing congestion and improving commute efficiency.
Correct: A
The argument presents a paradox: significant investment in public transportation, yet an increase in average commute times. To explain this surprising finding, we need a factor that could counteract the positive effects of public transport improvements. Option A provides a strong explanation: if the growth in private vehicle ownership has dramatically increased during the same period, then overall road congestion could still worsen significantly, leading to longer commute times for everyone, including public transport users (if they use roads for parts of their journey) or those who might have switched from private to public transport but are still caught in wider congestion. This factor overwhelms the benefits of public transport investment. Option B suggests the projects aren't finished, but the problem states 'over the past decade,' implying a period for completion. Option C explains why people might not switch but doesn't explain why existing commute times *increased*. Option D points to a potential flaw in the study's measurement but doesn't explain the underlying reality if the measurement is accurate. Option E indicates a *positive* outcome for public transport, which would deepen the paradox, not explain it.