Marsupials are found in North America and Australia, but they would not have been able to swim across the ocean. According to scientists, how did this group of organisms come to live on two separate continents? Marsupials used to have adaptations that allowed them to swim but lost these adaptations over time. The two groups of marsupials evolved independently of one another on two separate continents. The continents were once connected, and marsupials were able to migrate over the land. The oceans were shallow in prehistoric times, which allowed the marsupials to travel from one continent to another.

The continents were once connected, and marsupials were able to migrate over the land.

Explanation:

There are a lot of evidences present which indicates that the continent were once connected and present as a super continent but with the passage of time, this super continent splits into two parts and go far from each other. Marsupials also present on two different continents such as America and Australia. These two continents first attached to one another and these Marsupials spreads on these lands. With the passage of time, they splits and go far from one another.

C: The continents were once connected, and marsupials were able to migrate over the land.

Explanation:

Correct on the Edgenuity test & verified on Quizlet

"d.) carbon dioxide and hydrogen sulfide"