Which sentence best describes the influence of alliances on the start of World War I? Alliances delayed the beginning of World War I because nations were afraid to attack one another.
Alliances forced member nations to settle their differences through talks rather than through armed attacks.
Alliances prevented many European countries from joining the war because they had signed a pledge not to.
Alliances between nearly all European nations meant that when two went to war, all became involved.

D - Alliances between nearly all European nations meant that when two went to war, all became involved.

Explanation:

As we see from the pattern of alliance and agreements, each country was wary of the other for an extended period. The alliances that were meant to ensure the safety of each country, instead pulled so many into war with each other, just because they supported or had an agreement with the other to extend support during the war.

small european communities with shared traditions consolidated into large new states (apex)

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.