Final answer:
A United States flag patch should be worn on the right sleeve with the blue field facing forward to symbolize honor and respect, and to give the illusion of the flag moving forward during a march.
Step-by-step explanation:
The proper way to wear a patch depicting the United States flag on a uniform is B) On the right sleeve, with the blue field facing forward. This placement ensures that the flag looks as though it's advancing and not retreating. This orientation signifies honor and respect for the flag, aligning with the principle that the flag should always appear to be in motion as if carried by a breeze during a forward march.