The correct answer to this open question is the following.
Although the question does not include options, we can say the following.
The Methodist missionaries that brought interest for people to settle in Oregon with letters mentioning the good soil and climate were the Missionaries of the Methodist Episcopal Church. These missionaries were interested in the evangelization of the Native American Indian tribes of the North Pacific. Jason Lee was the leader of the mission that also had political participation in the issue of the Oregon territory. Specifically in what was known as the dispute of the Oregon boundary.