Which of the following would be the best summary of the above passage?

john lennon, paul mccartney, george harrison, and ringo starr were musicians in the band called the beatles. during the 1960s, the beatles dominated the popular music scene. the band released numerous albums that sold all over the world. throughout the 1960s, the beatles' albums became more inventive and complex. one of the group's most famous albums was rubber soul. the beatles released this album in 1965. the album had similar sounds to the band's earlier pop music, but it also showed the beatles could release more creative and complex music. most people would regard the beatles as the most famous band of the 1960s. although the group broke up in 1970, they had a great impact on popular music.

a.
john lennon and paul mccartney led the most famous band in the world.
b.
the beatles were an influential band whose music evolved during the 1960s.
c.
during the 1960s, many bands, including the beatles, impacted popular music.
d.
popular music from the 1960s greatly influenced music during the 1970s.