The cost of packing a box of chocolates is given by 1/4 x^2 where x is the number of chocolates (a box can never have fewer than 3 chocolates). If the welght of a box of chocolates is given by x + 2, what is the cost of packaging per weight unit?
А. 1/4x - 1/2 + 1/x+2
B. 1/4x^2 - 1/2x + 1
C. 1/4x^2 - 1/2 +1
D. 1/4x - 1/2 - 1/x+2