Skills with attribute chooses
 

How Do I make a skill that the player can pick the Attibute to use or that has multi attributes that use it?

I should have included an example.
Say your character picks the skill Investigation and they can pick which attribute works with it, say perception of intelligence. Or a skill that can choose from multi attributes depending on the players choice?

This is important for a roll n keep system as the skill and attribute combine to make the dice roll.