Can anyone help I already know it’s not B

Which of these is a disadvantage of hydrogen fuel cells? a. engines that use hydrogen fuel are more efficient than gasoline-powered engines. b. the only emission produced by hydrogen fuel cells is water. c. hydrogen fuel is continually available and useful for heating. d. hydrogen fuel is often purified in a process that emits lots of greenhouse gases.

If you’re the victim of cyberbullying behavior, besides contacting your teacher or the school, where else can you go to find information?

100 points! striked out answers are wrong