What evidence supports the conclusion that this photograph was likely taken in the early 20th century rather than the late 19th century?
a) the model of the car pictured did not exist in the 19th century
b) the men look more familiar to us in the 20th century
c) the blurry images indicate that the camera is very old
d) the photograph is in the black and white rather than color

The that evidence supports the conclusion that this photograph was likely taken in the early 20th century rather than the late 19th century is that the photograph is in the black and white rather than color.  

The nineteenth century gave birth to the photography and how it was perfected, but undoubtedly, the twentieth century changed photography for good with the arrival of color, flash, snapshot through polaroids as well as digital photography. A century that forever changed photography.

In addition to these technological advances photography changes its course, begins to have a more diverse purpose and to enter the artistic world. Pictorialism brings together a group of photographers who see photography as a continuation of painting.

the answer is a) to be able to obey them.