I'M STUCK PLZ HELP ASAPWhat caused California’s population to increase in 1848 and 1849? Cotton production expanded. Gold was discovered. California became a state.

Gold was discovered  

California experienced a gold rush between those times because of gold that was discovered.

Explanation:

answer=(oversee the conversion of peacetime industry to war industry)

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2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."