A major difference between the work of a "pure" or "straight" photographer, such as Alfred Stieglitz, and the work of a documentary photographer, such as Dorothea Lange, is:

A. the choice of subject matter.
B. the era in which the photographers worked.
C. the different intentions of each photographer.
D. the invention of the digital camera.
E. the cost of hiring models.

C
Stieglitz believed that for photography to be an art, it must be true to its own nature and not try to be painterly. Lange's work was photojournalism, intended to document and inform, and her photographs created a visual journal of the effects of the Great Depression.