Della and Jim both make sacrifices for each other because they care about each other. Della sacrifices her hair, and Jim sacrifices his watch. Even though their sacrifices make them unable to use each other's presents, they realize how important their love is. This makes them wise, as the theme suggests.

a,b,d are the three sentences that use a reflexive pronoun

"a" because he is appealing to logic as oppose to appealing to the audience's emotions.

the group received an extra pound of butter for christmas.

the annex was delighted to hear that we'll all be receiving an extra quarter pound of butter for christmas.

in "people in peace, not profit and war" chrisholm uses inductive reasoning for her argument against defense spending by stating that the new administration, like most americans, wanted to invest in social objectives, so they must not want to prioritize defense spending. mr. nixon said "we can delay no longer in launching new approaches to the problem that beset them", but chrisholm points out that the programs were delayed anyways.