What was one advantage of using steam-powered locomotives in the 1800s?
a. locomotives were only used to transport cargo.
b. locomotives were only used to transport passengers.
c. locomotives relied on readily available horse power.
d. locomotives could carry more goods than carriages.
i think it is either d. or a. but not sure.
explain

- "the past is made of multitudinous items ranging from anything that can be collected, recollected or assessed to originate in the past. as such, the past is a gallimaufry of particulars that may not have been related in any way. however, the human mind seeks organization to understand concepts and other things. the human mind therefore seeks relationships in explaining and studying the past. history being a humanity, dictates that historians have to serve this human trait by bringing structure to details of the past. historians do this by creating interpretive frameworks that capture as many details as possible."

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