1: A: "Westerners wanted to spread their religion, sell manufactured goods..."
Marketers were sought for the industrial products, many raw materials were needed for the growing industrial sector, capitalism stimulated investment in other territories.
As regards religion, they had the desire to spread Christianity, to protect european missionaries in other lands, to spread european values and moral beliefs and to educate peoples of other cultures.
2: B: "They had strong governments, advanced economies...."
At a time, Europeans had more modern weapons than Asia and Africa, also, the African and Asian empires were weakened empires, they could not compete with Europe.
3: D "It forced people to grow cash crops"