Question

us casualties in europe and africa (1942)
in 1942, the number of american casualties
slightly decreased in november and december.
slightly increased in november and december.
sharply decreased in november and december.
sharply increased in november and december.

Explanation:

To determine the change in American casualties from November to December, we analyze the bar graph. November has around 2000 casualties, and December has around 1400 - 1500. The drop from November to December is significant (from ~2000 to ~1400), so it's a sharp decrease.

Answer:

sharply decreased in November and December.