Nobody can help but be______ by the world into which he is taken by the science fiction.

A．integrity
B．unity
C．entirety
D．intensity

A．it is the printed version of standardized folk music
B．it encourages people to popularize printed versions of songs
C．it tends to standardize folk songs when it is used by folk musicians
D．it has a great effect on the music-culture as more and more people are able to read it