Final answer:
Option (a), The statement that wheel ruts from Oregon Trail wagons are visible today is true. These remnants are evidence of the massive 19th-century westward migration and can still be seen in some areas.
Step-by-step explanation:
The statement that wheel ruts from Oregon Trail wagons are still visible today is True. The Oregon Trail, which stretches 2000 miles from Missouri to the West, was used by over 400,000 settlers between 1845 and 1870. These intense movements left behind wheel ruts that have withstood the test of time. Despite natural erosion and the passage of centuries, in certain areas, these ruts are indeed still visible, serving as a historical testament to the massive migration westward during the 19th century.
Moreover, the significance of the Oregon Trail extends beyond these physical remnants. The journey was arduous, challenging pioneers with illness, starvation, and danger. Relations with Native Americans were complex, with tribes often guiding or trading with emigrants, contradicting many stereotypical narratives of relentless conflict.