It consisted of laws admitting California as a free state, creating Utah and New Mexico territories with the question of slavery to be figured out in their own state by popular sovereignty, ending the slave trade in Washington DC (important) and making it easier for southerners to capture and take back run away slaves
I believe that it most likely would be D.
Answer:
The primary positive effect of the Columbian exchange was the introduction of New World crops, such as potatoes and corn, to the Old World. The most significant negative effects were the transmission of African populations into slavery and the exchange of diseases between the Old and New World.
