The Window Width and Window Length Settings for a Given

The window width and window length settings for a given examination of the abdomen are 400 and 0, respectively. Which of the following is true?

A) all structures between -200 and 200 will spread through the gray scale
B) all structures between -200 and 200 will be white
C) all structures between -200 and 200 will be black
D) only those structures above 400 will have different shades of gray