In the early days of photography, few people had photographs taken—why? people rarely trusted new technology
they had never heard of photography
it was very expensive to get pictures taken
people were less likely to celebrate special occasions

C. it was very expensive to get pictures taken

In the old days, it was very expensive and time costly. People didn't smile in pictures back then because you had to stay still for hours for the picture, and people just couldn't hold a smile that long.

b energy transmission, d energy distribution, and e energy education

your answer would be d.)