In the U. S. and Canada, military markings are: Select one: a. uniform. b. not necessarily uniform. c. identical to national systems. d. the same as the Globally Harmonized System (GHS).

b. not necessarily uniform

Explanation:

Military markings are marks on military equipments, facilities or vehicles that serve to illustrate certain military functions or purpose. The AR 850-5 is the US Army manuscript that bears the outline of the regulations for marking vehicles, equipment, supplies, and clothing. However the publication isn't strictly adhered to as as military markings in the U.S are not always uniform. This is also noticed in Canada.