The correct answer should be <span>B. feared encroaching European influence
They saw what China went through in its encounter with European forces and they didn't want for the same thing to happen to them. They also wanted to implement imperialistic policies as well and this was common at the time when everyone started spreading.</span>
Lower class servants, both black and white, joined together in the frontier rebellion against the Native American tribes. As a result of witnessing this, the higher (and ruling) class became alarmed, which ultimately increased opposition across racial lines.
I believe the answer is:
"We live our lives taking each second for granted. But what would you do if you knew how much time you had left?"