Which of the following best explains the expansion of participatory democracy in the early nineteenth century? A
The abolition of slavery in most northern states
B
The growth of manufacturing along rivers and canals
с
The extension of suffrage rights to most adult White men
D
The influence of the early women's rights movement

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.