Elf Ranger "Master" Level Benefit

The Master level benefit reads thusly:

“Double the benefits of using a bow, sword or dagger in a fight: choose bow, sword or dagger. A sword grants +2D per action; a bow gives +4D to maneuver or counts as longer range than all other missiles; a knife grants two free disarms on a successful Maneuver.”

Do you pick one and only one (bow, sword or dagger) when you gain the level benefit or do you gain each bonus depending on what you’re wielding? Seems like it’s the former, but I just wanted to confirm.

You specialize in a single weapon. Or, not and.