This article is from the Anime FAQ, by Steve Pearl with numerous contributions by others.
a)Advanced Defense Police ^ ^ ^ b) ADvanced Police ^^ ^ c) About-to-Die Police ^ ^ ^
According to Animerica, the answer is:
a) Advanced Defense Police (per ANIMERICA #0) ^ ^
Of course according to the computer terminals in "Scoop Chase" (BGC8)
it's ADvanced Police. ^^ ^
Given the Japanese people's famous accuracy and consistancy in using English, it is quite possible that both A & B are right.