How could the continent have gotten so far apart, and about how long it take for this to happen?

The continents rest on massive slabs of rocks called tectonic plates. Then the tectonic plates are always moving and they interact in a process called plate tectonics. It’s been about 2 million years for this to happen

Answersource rock;

This would be an open primary. a closed primary people can vote only prior to election day if the party if they are registered. independent voters can not participate. there is not a wide-open primary, but there is a semi-open primary.