If a singer's song transend musical genres, can you classify them as either rap or rock? why?

The correct answer to this open question is the following.

If a singer's song transcends musical genres, you don't classify them as either rap or rock. This statement includes a part of the answer when it says "transcends musical genres." If that is the case it means that the song is a now a "classic" beyond a broader term call rock, that originally was written under the influence of a musical genre or the fusion of different rhythms. But with the pass of time or popularity, the song is part of the culture of a generation that is considered that trascended musical genres and simply is popular.

i would like to compare these two interpretations of the crucible : 1) eric christ's interretation and wade bradford's interpretation. the main differences between there interretaions is that in the first one you can notice direct link to joseph mccarthy whereas the second one represents how the town is filled with hysteria.the second interpretation shows that author believes that the story   about puritan town in salem is based on actual events while the first example shows the sencible reference to sort of bias.