Question

1. as the united states acquired more land between 1803 and 1850, controversy over these territories focused on the

a. need for schools and colleges b. failure to conserve natural resources
c. expansion of slavery d. construction of transcontinental railroads
i.
a. nullification crisis
b. kansas - nebraska act
c. dred scott v. sanford
d. election of lincoln (1860)

Explanation:

For the first multiple - choice question (question 3):

During 1803 - 1850, the US acquired lands like through the Louisiana Purchase, Oregon Treaty, etc. The main controversy was about whether slavery would expand into these new territories. Option A (schools/colleges) was not a major focus. Option B (natural resource conservation) was not a key issue then. Option D (transcontinental railroads) were built later (1869), so not in this period. So the correct answer is C.

If the question is about events related to slavery expansion in new territories: The Kansas - Nebraska Act (B) let territories decide on slavery (popular sovereignty), sparking conflict. Dred Scott (C) ruled slaves couldn't be citizens and Congress couldn't ban slavery in territories. Election of Lincoln (D) was due to slavery - related divisions. Nullification Crisis (A) was unrelated. If choosing one most directly about territory - slavery expansion, B (Kansas - Nebraska Act) is a strong candidate as it dealt with organizing new territories and slavery.

Answer:

C. expansion of slavery

For the second part (the list under "I."):

Assuming it's a question about which event relates to the slavery expansion controversy:

• Nullification Crisis (A) was about states' rights and tariffs, not slavery expansion.
• Kansas - Nebraska Act (B) allowed popular sovereignty on slavery in those territories, directly related to slavery expansion.
• Dred Scott v. Sanford (C) was a Supreme Court case about slave rights and territories, related.
• Election of Lincoln (1860) (D) was a result of slavery - related tensions. But if we consider the immediate controversy over new territories' slavery status, the Kansas - Nebraska Act is a key event. However, without a specific question, if we assume it's matching to the slavery expansion theme: