[单选题]
What principle is responsint anovai ;g +qu g x;2 (.rbh*s;dko;(uz2(qvble for alternating light and dark bands when l57gdw ya rn2r)pxxhc: ,c7od+ ight passes through two oy2rd7dac7 xr ),ph 5:gwn co+xr more narrow slits?
A. refraction
B. polarization
C. dispersion
D. interference
