I believe the answer is B
These characteristics are describing the Nullification Crisis. (Answer choose b) When Congress raised tariffs once again in 1828, former Vice President from South Carolina John C. Calhoun proposed the nullification issue, claiming South Carolina could make this latest law "null and void" and that states could nullify any law they deemed unconstitutional.
Answer:
Mansa Musa developed cities like Timbuktu and Gao into important cultural centers. He also brought architects from the Middle East and across Africa to design new buildings for his cities. Mansa Musa turned the kingdom of Mali into a sophisticated center of learning in the Islamic world.
The answer is D. Senators must be 30 years old, whereas members of the House of Representatives must be 25. Being a lifetime resident of D.C., as well as being a registered voter in a home state, are no requirements.
