Because the cause and effect set off the story or really whatever your writing
A system of manufacturing that uses machines to rapidly produce large amounts of a product
So difference is culture of South America and Mexico and how they alike is that South America is quite on like the Mexico in terms on their history and the Spanish is the real connection of both two and the difference of all of them is their foods, manner and basic habits that both have molds in past years
Both C and D is what I think please tell me if I am wrong