The southern colonies supported plantation economics. this meant they had large farms and grew crops, which they exported. which group of exports below would most likely have come from a southern colony? cotton, indigo, and tobacco textiles, spices, and iron bars fish, whale products, and fur fish, rum, and iron bars

Okay, let's think about this one.  If the Southern colonies grew and exported crops (plants), then the right answer is likely to be a group of crops.  Are fish, rum, and iron bars crops?  Nope, those are diverse exports, but the South supported plantation economics.  What about fish, whale products, and fur?  No: these come from animals.  Textiles, spices and iron bars aren't crops either.  However, cotton, indigo, and tobacco are all crops.  In fact, they're what are called CASH CROPS: they are farmed in large numbers on plantations and sold for a good sum of money, and they supported the Southern economy!  "Cotton, indigo, and tobacco" is the right answer.

cotton, indigo, and tobacco

Ithink the answer is a.