In the south during the industrial revolution,

a. all southern farmers had enslaved workers
b. most plantations had fifty or more enslaved workers
c. about twenty-five percent of southern households had no enslaved workers
d. about twenty-five percent of southern households had enslaved workers

About 25 percent of Southern households had enslaved workers

Explanation: Slavery was the dominant labor system in the South but  the number of enslaved people on homesteads and plantations varied according to the wealth of the landowner.

(b) britain had a much larger navy than the u.s.

(d) the u.s. had a small army compared to britain.