(a)Base Offense Level (Apply the greatest):
(1) 2 plus the offense level from §2D1.1 applicable to the quantity of controlled substances directly involving a protected location or an underage or pregnant individual; or
(2) 1 plus the offense level from §2D1.1 applicable to the total quantity of controlled substances involved in the offense; or
(3) 26, if the offense involved a person less than eighteen years of age; or
(4) 13, otherwise.