The answer to this would be B- Longitudinal Study.
Answer:
BCE is after 0, so about 2019 years ago
Explanation:
Short Answer: The scientist named would be <span>Ivan Pavlov.
I would be really happy if I get brainliest.</span>
The 10% plan was a plan for reconstruction in the south. Each southern state had to have 10% of their citizens say that they would be loyal to the U.S. The answer would be C. Readmitting southern states into the Union.