According to Graham Allison book, Nuclear Terrorism, only 5 percent of daily cargos into the U.S are screened where every day 30,000 trucks, 6500 rail cars and 140 ships deliver over 50,000 cargo containers into the United States. This rarely involves physical inspection which may not detect nuclear weapons and fissile materials.
The answer is: C. They originated in the 1800s as competitions at the completion of cattle drives.
Rodeos originated in the 1800s from cattle herders who had the specific skills of working as cowboys or "vaqueros". These skills were honed to the point of creating competitions and contests, therefore, making rodeos more than entertainment, a form of professional sport.
I believe it was Gerald Ford which was the 38th president of the United States. Hope this helps!
