whiCh oF thE Following ContriButEs to thE EmErgEnCE oF musiCAl proDigiEs ACCorDing to thE pAssAgE
A、
A、nAturAl giFt.
B．ExtEnsivE knowlEDgE oF musi
C、
C、vEry EArly trAining.
D．
A、prEjuDiCE-FrEE soCiEty.