What connotation is attributed to the “parlor generals” in the following lines from “To Be of Use”?

What connotation is attributed to the “parlor generals” in the following lines from “To Be of Use”?

[people] who are not parlor generals and field deserters / but move in a common rhythm / when the food must come in or the fire be put out. (1 point)

a. laziness
b. brutality
c. patience
d. indifference