How are we running the spell Enhance Ability

Here is the text from the player's handbook:

Enhance Ability
2nd-level transmutation
Casting Time: 1 action
Range: Touch
Components: V, S, M (fur or a feather from a beast)
Duration: Concentration, up to 1 hour.
You touch a creature and bestow upon it a magical enhancement. Choose one of the following effects; the target gains that effect until the spell ends.
Bear’s Endurance. The target has advantage on Constitution checks. It also gains 2d6 temporary hit points, which are lost when the spell ends.
Bull’s Strength. The target has advantage on Strength checks, and his or her carrying capacity doubles.
Cat’s Grace. The target has advantage on Dexterity checks. It also doesn’t take damage from falling 20 feet or less if it isn’t incapacitated.
Eagle’s Splendor. The target has advantage on Charisma checks.
Fox’s Cunning. The target has advantage on Intelligence checks.
Owl’s Wisdom. The target has advantage on Wisdom checks.
At Higher Levels. When you cast this spell using a spell slot o f 3rd level or higher, you can target one additional creature for each slot level  above 2nd.

So when casting at a higher level are all subjects affected by the same effect or is the caster allowed to choose for each target?