I am not quite sure of the answer but I think its d. . Let me know if you've already taken the exam and what the answer is.
Ending the slave trade and ending slavery have two completely different effects on a society. Ending the slave trade merely stops owners from exchanging different people. Even though the slave trade may end, slavery would still exist.
Answer: The discovery of gold nuggets in Sacramento Valley which came to be known as The California Gold Rush.
The right answer is protein. Legumes are well known for their low fat content and high protein content