The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
Most anthropologists believe that the migration process of the native Americans across the present-day Bering Strait was completed 15,000 years ago.
Historians and anthropologists agreed that migration through the Berin Strait started approximately 30,000 years ago when the first humans from Asia crossed the Berin Strait that was frozen at that time due to the extremely cold temperatures. They came from Siberia to America by crossing what is formally known as the Berin Land Bridge.
After Octavian took over as an un-voted leader by the senate, Rome lost it's Republican values and went to a Monarchy. This is why Historians refer to it as an Empire.
The War Powers Resolution (also known as the War Powers Resolution of 1973 or the War Powers Act) (50 U.S.C. 1541–1548) is a federal law intended to check the U.S. president's power to commit the United States to an armed conflict without the consent of the U.S. Congress.