According to the Passage, What Key Grievance Led Frontier Settlers

According to the passage, what key grievance led frontier settlers in North Carolina, like Hermon Husband, to instigate armed resistance against the proprietary government?

A) The proprietors were cutting down trees on the vacant land that the settlers wanted for building houses.
B) The proprietors were preventing colonists from settling the wasted land on the frontier.
C) Colonial offices were closed, so settlers couldn't get their land claims legalized.
D) The colonial government failed to protect the frontier settlers from attacks by neighboring Indians.