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.

the answer is option a.

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.