Although color photographic film was available to artists in the early twentieth century, many preferred black-and-white film because it was less expensive and less susceptible to technical problems, and because color prints .a) tended to fade over time.
b) were less popular with the public.
c) were easier to copy.
d) were considered too commercial.

(a) tended to fade over time.

Explanation:

In the early twentieth century, artists preferred to use black and white film over colored film. This was because colored film tended to fade over time while black and white film lasted for much longer periods and was also less expensive.

for many centuries, the catholic church has been a patron of the arts. the church has used various scientific methods to maintain its power.

not 100% sure though!

answeras live actors preforming in the same room as a live audience;