The 1975 amendments added protections from voting discrimination for language minority citizens [link to tools of suppression and fed law]. The law now requires jurisdictions with significant numbers of voters with limited or no English proficiency to provide voting materials and assistance in relevant languages in addition to English.
The answer is C) The Southern colonies' economy had growing labor demands.
Crops like sugar cane, tobacco, and cotton took lots of physical labor to take care of and harvest. Plantations needed workers who they could work all the time and who would be cheap to buy.
Hope this helps! Please let me know if I'm wrong. :)