How did the death of archduke franz ferdinand instigate the collapse of peace in europe?

Which statement best describes the underground railroad? a.) it is a train that took slaves from the south to the north. b.) it is a business that harriet tubman founded to slaves become free. c.) it is a secret route that slaves took to escape from southern slave states to the north. d.) it is a road that slave owners disliked using for travel.

Need will give brainliest which of the following was the most significant aspect of revel's election to the senate?

Profits are maximized when marginal revenue and marginal costs are a. set c. equal b. less than market price d. greater than market price