Mark and Ann together were allocated n boxes of cookies to sell for a club project. Mark sold 11 boxes less than n and Ann sold 2 boxes less than n. If Mark and Ann have each sold at least one box of cookies, but together they have sold less than n boxes, what is the value of n? Choices:  A) 10  B) 11  C) 12  D) 13  E) 14

Rationale: if n = 12 mark sold 1 box and ann sold 10 boxes total 11 < 12 answer : c
Answer: C