Based on the scenario presented, the U.S. Government's actions to roll back immigration restrictions, ease access to immigration benefits, update the asylum system, and provide a pathway to legalization for illegal immigrants suggest a focus on making migration more accessible and beneficial to immigrants.
Therefore, the correct statement is:
All three changes are opportunities for migration.
These changes can be viewed as designed to facilitate migration rather than create obstacles, aligning with the idea that they provide greater access and options for immigrants.