[单选题]
In order to produce a hologram, one ne3jil* *pq:dj xs08my vedb ni1y3 / pom8jnndo5;s, in addition to an object and a piece of photographic film,18nmdj;o5pn/io3 byn
A. a beam of monochromatic light and a mirror.
B. a beam of monochromatic light and a lens.
C. a beam of coherent light and a lens.
D. a beam of coherent light and a mirror.