Questions Refer to the Images Below

Questions refer to the images below.
Image A. Striking Steel Workers Homestead PA, 1892 Image B. Striking Dockworkers' Rally in Trafalgar Square, London, 1911
-How might a historian question the reliability of Image A?

A) Image A appears to be posed, so it is difficult to know if it is representative of the steel strike.
B) Since Image A is a photograph, it must be a reliable source.
C) Image A was taken by a photographer who was hostile to labor unions.
D) Image A shows that strikes were always peaceful in this time period.