California becoming a state was controversial because- A. Southerners were upset that it would be a free state
B. Mexican officials still claimed California was rightfully their territory
C. many Americans were prejudice against the many ethnicities that inhabited California because of the Gold Rush
D. Northerners were angered over the fact that California allowed slavery

c

Explanation:

The Gold Rush brought an influx of people and a pressing need for civil government. Californians applied for statehood in 1849, and after a tense debate in Congress over the slavery issue, California was admitted to the Union as a free, nonslavery state by the Compromise of 1850.

true

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.