Answer: I believe the most intentional consequence, would be answer 2. Europeans take corn to Africa. Corn becomes an important crop there.
Explanation: The first answer about the sailors and conquistadors infecting people with smallpox could be unintentional, because they could've not had any symptoms so they didn't know they had smallpox. Answer 3 doesn't make much sense to me.. so, I limited it down to answer 2.
Hope this helps!
Teddy Roosevelt was also known as the trust buster. He helped to stop the monopolies and the robber barons.
Rejected new voting rights, I know he hated the bank because they spent unwisely, the Whigs were a rival party, and Thomas Jefferson used spoils system which means it was around before Jackson.
