Final answer:
In exchange for accepting California as a free state, the Compromise of 1850 established a stricter fugitive slave law. The correct option is A.
Step-by-step explanation:
In exchange for allowing California to join the Union as a free state, the Compromise of 1850 offered several provisions, including the establishment of a strict fugitive slave law.
This law was part of a package of bills that were passed to address the contentious issue of slavery in the newly acquired territories after the Mexican War.
The compromise included the organization of New Mexico and Utah territories with the question of slavery to be decided by popular sovereignty, the settlement of Texas' western boundary with compensation to Texas, the abolition of the slave trade in Washington D.C., and the admission of California as a free state.
Specifically, regarding the options provided in the question, the correct answer is that the Compromise of 1850 established a stricter fugitive slave law as part of the measures in exchange for allowing California to grow into a nation as a free state. The correct option is A.