Answer: During the Proterozoic Eon, the supercontinent named Rodinia existed, which eventually broke apart and its fragments drifted away from each other. North America was a part of Rodinia, and therefore, geologists would expect to find rocks shared with North America on other continents that were also once part of Rodinia.
Based on the available options, geologists would likely find rocks shared with North America on South America and possibly Antarctica. This is because these continents were located adjacent to North America within the supercontinent Rodinia. However, it is worth noting that some shared rock formations might also exist on other continents that were once part of Rodinia, such as Australia, India, and Africa.