Question

which statement best describes the reason why most northerners did not want slavery to spread into western territories?
a. new states could never be admitted if slavery was denied in the western territories.
b. antislavery laws could not be enforced in western territories.
c. slavery in the western territories would take away job opportunities in northern states.
d. the growth of slavery in the territories would shift the balance of power in congress.

Explanation:

The balance of power in Congress was a crucial factor. If slavery spread to western territories and new slave - holding states were formed, the political influence of slave - holding interests (largely southern) would increase. Northerners were concerned about this shift in power.

• Option A is incorrect because new states could be admitted without slavery (e.g., free states).
• Option B is not the main reason as the enforceability of anti - slavery laws was not the primary concern regarding the spread of slavery to western territories.
• Option C is incorrect as the impact on northern job opportunities was not the main driver; the political balance in Congress was more significant.

Answer:

D. The growth of slavery in the territories would shift the balance of power in Congress.