Which major ideas did charles darwin introduce in his writings?
(there can be more than one answer o. o)

a.) the social contract
b.) the germ theory of disease
c.) natural selection
d.) survival of the fittest

i think it is c, i am kinda thrown off by the "more than one can be correct" part

Did president truman warn japan against a second bomb attack

How did americans disagree over the role of federal and state goverment before and durning the civil war

Which statement best summarizes the outcome of the haitian revolution? a. french colonists agreed to remain in haiti to the new countryplan its government.b. france gave up control of haiti, but it forced haitian leaders toallow slavery to continue.c. haiti established a short-lived democratic government, but it wassoon colonized again by spain.d. haiti became independent from france, but the fightingdevastated its economy.