What was the impact of double-stacked railroad cars on the state economy?

a) it reduced the cost of shipping goods to and from the east coast
b) it brought an end to the most seaborne cargo transport
c) it loggers harvest more timber
d) it led to a takeover of the state railroad monopoly

i cant if you dont give me the sentence or whatever.

man·u·script

/ˈmanyəˌskript/submit

noun

a book, document, or piece of music written by hand rather than typed or printed.

synonyms: document, text, script, paper, typescript

an author's text that has not yet been published.

thats all i can with. sorry. next time post the full question.