Question

which question about public transportation could best be answered using only prior knowledge? ○ how many of your classmates use public transit? ○ how does public transit benefit the environment? ○ which cities have the most efficient public transit system? ○ what type of public transit does your family prefer to use?

Explanation:

To answer "How many of your classmates use public transit?" or "What type of public transit does your family prefer to use?" or "Which cities have the most efficient public transit system?" requires collecting new data (surveying classmates, family, or researching city transit systems). But the environmental benefits of public transit (like reducing carbon emissions, lessening traffic congestion - related pollution) are general knowledge based on scientific understanding of transportation's environmental impact, so it can be answered with prior knowledge.

Answer:

How does public transit benefit the environment?