1. Louis Daguerre's contribution to photography changed which of the following.
A. How long it took to take a picture.
B. The types of stands that most cameras used.
C. The amount of light required to take a picture.
D. What people took pictures of
Kind of a silly question. Since no practical photography existed before Daguerre, none of the answers apply since the change was images themselves. So all of the answers are silly.
Answer D: Portraits were very favorable due to one could get folks to sit still for several minutes.