"A diverse group from many countries" BEST describes the people who flocked to California during the gold rush.
Option: A
Explanation:
In January 1848, a fellow named James Marshall playfully spotted a couple of sparkling flecks in a California stream at Sutter's Mill, discovering gold nuggets in the Sacramento Valley.
News spread gold and citizens from across California quickly flocked inland in search of instant riches. Resulted into one among the most famous moments in the history of America.
The Guadalupe Hidalgo Treaty was eventually concluded, finishing the Mexican-American War, and putting California in the possession of the U.S.
