[LegoLife]

My answer is E.

Argument : Musicologists hypothesize that the seven-note musical scale used in modern music is adapted since Renaissance.Though, the diatones capable of playing upto 6-note were in use some several thousand years ago.

Strengthen : If the primitive people had knowledge about the seven-note musical scale, they'd have used it in their musical instruments [ perhaps more than 4 holes ].

Even though the cave-bear bone was long enough to contain several holes for playing a complete musical scale, the neanderthals used only 4.Hence, they didn't have knowledge of playing beyond the sixth-note.