The direct effect of the Compromise of 1850 was that the "California would be a slave state"
What is Compromise of 1850?
The Compromise of 1850 was package of five separate bills passed by the United States Congress in September 1850 that defused a political confrontation between slave and free states on the status of territories acquired in the Mexican–American War.
In 1849 California requested permission to enter the Union as a free state, potentially upsetting the balance between the free and slave states in the U.S. Senate
Hence, option D is correct.
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