Final answer:
The idea about colonialism most clearly expressed in the excerpt is that the colonists cruelly harm human beings for no reason.
Step-by-step explanation:
The idea about colonialism that is most clearly expressed in this excerpt is option B. The excerpt states that the colonists cruelly harm human beings for no reason. This suggests that the colonists are committing acts of violence and harm against the indigenous people in the colonies without justification.
Learn more about colonialism