Which of the Following Best Describes the Way in Which

Which of the following best describes the way in which Christianity spread throughout Europe, beginning in the eleventh century?

A) Knights seized land through military conquests and converted conquered populations with the help of clergy.
B) Individual Christian missionaries wandered throughout Europe with the sole purpose of spreading Christianity.
C) Christian merchants spread Christianity as they traveled to sell their goods.
D) Bands of Christian women made it their primary duty to spread their religion through acts of charity and education.