What purpose does the underlined portion of this excerpt serve in the argument that Americans should agree to pay more taxes to raise money for entering the war? It introduces the claim that patriotic Americans should be willing to sacrifice and pay extra taxes. It provides the reason why extra taxes must be collected should America decide to join the war. It counters the claim that extra taxes may not be collected fairly or put to good and honest use. It offers evidence that Americans can trust their president should extra taxes be collected.