The word 'altruistic' is an adjective that defines the quality of someone who is self-less and thinks more about others over one's own gain or advantage.
In the given passage, the correct word which defines the term 'altruistic' is generous. The word 'generous' correctly fits the sentence. And, the remaining part of the sentence also helps to know that the term is trying to define the 'generosity of the person. The words like <em>'always giving money or things to local charities' </em>also adds to the term.
Thus the correct word for 'altruistic' is <em>generous </em>(C).
