Which option below is an example of the author's use of logos in "Lifeboat Ethics: The Case against Helping the Poor"?

AThe author provides the population rates of the United States and several other countries.

BThe author quotes people who are authorities on the topic of famine relief and hunger.

CThe author divides people into categories of "us" and "them," a tactic to scare the audience.

DThe author references several historical and literary figures, adding to his credibility.