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which event increased interest in a railroad route to california?

discovery of gold

opening the erie canal

improvement of the lock system

joining the first transcontinental railroad

The event that increased interest in a railroad route to california is to: a. discovery of gold.
the person who was found california gold rush is james w. marshall, after hear that information, the flocking start to the state in late 1848.

hope this help

The answer to your question. is b