To determine the percentage of all traffic fatalities that are alcohol impaired, let's consider the statistical data.
1. First, we understand that alcohol-impaired traffic fatalities are an important aspect of overall road safety statistics.
2. According to reliable data sources and general statistics in road safety, it is known that alcohol plays a significant role in traffic-related fatalities.
3. Evaluating the given choices:
- a. 10% appears to be too low considering the impact of alcohol on driving capabilities.
- b. 20% might still be an underestimation of the extent of the problem.
- d. 40% might be an overestimation, as it represents almost half of all fatalities, which seems unreasonably high.
4. With further consideration of the general statistics around the issue, we pinpoint that a more accurate and agreed upon figure is generally 30%.
Thus, alcohol impaired traffic fatalities account for approximately 30% of all traffic fatalities.
Therefore, the correct answer is:
c. 30%
