La repuesta es la primera
The assembly line reversed the process of automobile manufacture, but <span>cars were individually crafted by teams of skilled workmen.</span>
Answer:The widespread use of machine guns and rapid-firing artillery pieces on the Western Front meant that any exposed soldier was vulnerable. Protection from enemy fire could only be achieved by digging into the earth. Assaults were carried out across "No Man's Land" between the opposing trenches.
Answer:
With a lack of Native American workers, they, too, needed another source of labor. Plantation owners in both North and South America wanted a cheap workforce.
