A local government recently launched a public awareness campaign promoting carpooling to reduce traffic congestion. Despite an increase in public awareness about carpooling benefits, local traffic congestion has not decreased. This suggests the campaign was ineffective in reducing traffic congestion.
✓ Correct Answer: Option A
If the number of cars increased, the campaign might have prevented even worse congestion. Thus, the campaign could have been effective, but its impact was offset by another factor, weakening the conclusion that it was ineffective.