Carbon monoxide
a. the breakdown of other chemicals in the liver
b. fuel from igniting at the wrong time
c. blood from carrying oxygen to the tissues of the body
d. all of the above

- a government ruled by the people, or assembly. officials monarchy - a single ruler like a king. over time some city-states, like athens would change governments. what this means is that all the citizens voted on all the laws.

not sure but thinking i'ts cause the government was broke. not sure