all 3 are important , this poll is irrelevant
Nah. VPs are not that important as an opening move. VPs are a resource that you only need 1 to win a game. Fuel/Ammo will give you eventually the VPs. This doesn't work the other way round.
Answering OP:
It depends on what you are gonna use your resources first. If you are planning on rushing a vehicle you might want to rush fuel first. On the other hand, if you want a performance boost through weapon upgrade or surprise someone with some mine/grenade, you might want munitions.
Say, you are playing Soviets, you might want first munition as you are generally more limited by mp in order to tech. Therefore you might want to be more cost effective as early as you can with your CE flamer.