There was only one computer model choice, not two. The one choice said that there was additional and pertinent information that was not included in the computer model that likely would change the model. This is the one that I chose, but, other than the f-ing china/ukraine one, it is the one that I am most unsure of.
The argument stated that the only evidence for pangea breaking up in the fasion presented was the computer model in question.
I wish that someone could produce the wording of the "pangea broke itself up" answer choice. I think that it could have been the appropriate answer, but only if it precluded pangea breaking up because of the plumes/lava/whatever