Respuesta :
The answer is C.
The north didn't really need slaves (doesn't mean they didn't have any), the South, however, thrived by using slaves because of the free labor on their plantations.
Slavery was able to expand in the South and not the North because C) geography in the South promoted development of large plantations.
The geography and physical features of the South allowed for huge agricultural plantations where cash crops such as cotton were planted.
These plantations often required cheap labor to be profitable which was why the South turned to slave labor and why slavery was so big there.
In conclusion, option C is correct.
Find out more on slavery in the South at https://brainly.com/question/903078.