Which of the following reasons does not explain how the federal government played a major role in expanding slavery during the early 1800s?
A) The federal government secured Louisiana from the French in 1803.
B) The federal government removed Native Americans from the southeastern states in the 1830s.
C) The federal government annexed Texas and Mexican territories in the 1840s.
D) The federal government expanded participation in the International Slave Trade after 1807.