Question

why was the south vulnerable to a blockade by the north?
a. the north had a well-organized navy, while the south had no navy and few good ports.
b. the north had a much larger population than the south.
c. the north had a large manufacturing base to produce weapons, while the south was mostly agrarian.
d. the north had a larger railroad system for moving troops and supplies than the south.

Explanation:

The South relied heavily on importing manufactured goods and exporting cotton to fund its war effort. The North's strong navy could enforce a blockade, and the South lacked a significant navy to counter this, plus its limited good ports made it hard to evade the blockade. Other options relate to land-based or population advantages, not blockade vulnerability.

Answer:

A. The North had a well-organized navy, while the South had no navy and few good ports.