Selfless is the adjective here that can be used to lend more meaning to a statement. Recall that adjectives are words that describe nouns thus making them more meaningful.
Adjectives are used to give more expression to nouns.
Recall that nouns can be the name of a person, object, place, animal, or thing.
For example. Jude is a good person.
Expatiated: Jude is a good person because he is selfless.
Hence the correct answer is D.
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