Which of the following, if true, would most contribute to strengthening the researcher's explanation?

This choice does not directly relate to the taxi industry's dynamics. While it may reflect overall economic activity during snowstorms, it does not provide insight into why taxi drivers might choose not to work during such conditions or how this impacts taxi availability.

This statement suggests a level of independence among taxi drivers, but it does not address their decision-making during inclement weather. Ownership does not inherently explain why drivers would elect not to work when conditions are hazardous, failing to strengthen the researcher's claim.

While this fact highlights the frequency of adverse weather conditions, it does not offer an explanation for drivers' behavior during these times. It merely contextualizes the environment without linking it to driver decisions about working during inclement weather.

This choice provides information about typical passenger behavior but does not address the factors influencing taxi driver availability during poor weather. It fails to connect with the core issue of driver decisions in the face of hazardous conditions.