A daguerreotype was an early photographic method created using a:

A. carte de visite.
B. copper plate covered with silver iodine.
C. rayogram.
D. plate of glass.
E. gelatin silver print.

B
Daguerre made a breakthrough for photography by recording an image that was clear and sharp and could be duplicated easily. His light-sensitive surface was a copper plate coated with silver iodide, and he named his invention the daguerreotype.