Read this passage: By the early 1900s, European imperial powers had built up huge armies and navies to enforce their claims on colonies around the world. Each power raced to build a larger and more advanced army than its rivals in Europe. When Germany invested heavily in its navy, Great Britain and other European powers responded by pouring resources into their own naval forces. This led to a massive buildup of weaponry in Europe in the years before World War I.
Which contributing factor to World War I does the passage most clearly reflect?
A. The alliance system
B. Imperialism
C. Militarism
D. Nationalism​

Can you summarize this? it takes time and caution to perfect anything which must be concealed. it takes time to crush men who are pursuing legitimate trade. but one of mr. rockefeller’s most impressive characteristics is patience. there never was a more patient man, or one who could dare more while he waited. the folly of hurrying, the folly of discouragement, for one who would succeed, went hand in hand. everything must be ready before he acted, but while you wait you must prepare, must think, work. "you must put in, if you would take out." his instinct for the money opportunity in things was amazing, his perception of the value of seizing this or that particular invention, plant, market, was unerring.