Using traditional photographic paper, a slide, which is printed as a positive image,
a.
was not able to be reproduced as a print until the ilfochrome process was understood.
b.
provided the only method for artists to share their work with advertising agencies.
c.
had to be transferred onto light-sensitive paper, and then inverted.
d.
can portray colors and details more accurately then any other type of photograph.

a
wanted to give free points