Ameliorate the GOLD RUSH

Directions: students should grammatically correct the sentences below, in red. Look for a missing COLON (;). a missing apostrophe, and a missing comma.

the acquisition of the mexican cession led to the gold rush the result was that Californias population swelled quickly and it become a state in 1850.

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video suggested answer: 

The acquisition of the Mexican Cession led to the Gold Rush; the result was that California's population swelled quickly, and it became a state in 1850.