Question

what is a benefit of fuel cell cars over standard cars?
fuel consumption is reduced by 30–90 percent.
hydrogen - powered cell vehicles are cheaper.
hydrogen fuel is very safe and economical to store.
gas stations can easily be converted into hydrogen filling stations.

Explanation:

• Option A: Fuel cell cars (like hydrogen - powered ones) are more efficient, so fuel consumption reduction of 30 - 90% is a valid benefit.
• Option B: Hydrogen - powered fuel cell vehicles are generally more expensive to produce and purchase than many standard cars, so this is incorrect.
• Option C: Storing hydrogen fuel is not very safe and economical (it requires special storage conditions), so this is wrong.
• Option D: Converting gas stations to hydrogen filling stations is not easy (requires significant infrastructure changes), so this is incorrect.

Answer:

A. Fuel consumption is reduced by 30–90 percent.