To provide an accurate response, it's essential to specify the options or hypotheses you're considering regarding the Great Atlantic Migration. The Great Atlantic Migration refers to the significant movement of people, particularly from Europe to North America, during the 19th and early 20th centuries. Primary factors that could be theorized include economic opportunities, political unrest, and social factors.
If you can provide the list of specific forms or theories you're evaluating, I'd be glad to help you analyze them!