[单选题]
Light of wavelength 500 nm illuminates a soap film ( n = 1.33). What is the0 xmnd;q0 fki m9t01dwyyrw60 mi8*d b9bhugoe0.xlef-0:azrv *y- fd m nimum thickness of film that wiy .0:d*xmv*daze -lbuh0fr geb9 -f8oll give an interference when the light is incident normally on it?
A. $24 \; nm$
B. $94 \; nm$
C. $188 \; nm$
D. $376 \; nm$