thE Author impliEs thAt ExCitEmEnt ovEr thE DigitAl rEvolution mAy BE hinDErED By ______.
A．ignorAnCE oF thE tEChnology
B．roBust EConomiC growth
C．thE EConomiC rEAlitiEs oF its prACtiCAlity
D．EConomiC proBlEms oF hi-tECh CompAniEs