All of the following were provisions of the Compromise of 1850 except:

A. The slave trade would be protected in the District of Columbia.
B. A much stricter fugitive slave law would be enacted.
C. The use of popular sovereignty in Utah and New Mexico territories.
D. California would enter the Union as a free state.

The Compromise of 1850 included various provisions such as California's admission as a free state and the enactment of a stricter fugitive slave law, but it did not protect the slave trade in the District of Columbia.

Explanation:

The provisions of the Compromise of 1850 included:

Congress admitted California as a free state
Organized territorial governments for New Mexico and Utah under the popular sovereignty idea
Abolished the slave trade in Washington, D.C.
Enacted a more stringent fugitive slave law

The provision protecting the slave trade in the District of Columbia was not part of the Compromise of 1850.

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