Marsupials are found only in North and South America and in the Australian region. Their distribution is a result of the breakup of the supercontinent Pangea into Gondwana and Laurasia 120 mya. The modern distribution of marsupials is therefore a result of the effect of .

Continental drift.

Explanation:

The marsupials are mammals, they are nocturnal and they live in the canopy of the forest s and have broad diets. Most of the marsupials as diversity in the Australian continents that were geographically isolated. There dispersal and distribution is a result of the formation and deformation of landmasses at the time of the supercontinent of Pangea, into Gondwana and Laurasia.

The sun's parallax would be 180 degrees, greater than which you can't get.  so a. would be your anwser