Because door of world is open for all..
and so U.S entered WW1
The answer is <span>B. protest the Vietnam War.</span>
Answer:
Settling the Borderlands As conquistadors explored new territories, they claimed the areas for Spain. By 1600, the Spanish borderlands extended west from Florida across present-day Texas, New Mexico, Arizona, and California. At first, Spain did little to encourage settlement in these far-flung areas.
●It protected the right of a freed slave to file a lawsuit.