1.A; 2.E:
2.
A. balanchine works, a dancer who...[BAL.. WORKS IS NT A DANCER]
B...as dancer which...[bad referent (which)]
C. ...works, the dancer...[balanchine works is not a dancer]
D. ..balan works, who [works is not the dancer]
E. ...as a soloist..., as the dancer, and as a star... [i think this is correct]