A one-foot stick is marked in 1/3 and 1/4 portion. How many total markings will there be, including the end points?  Choose the most appropriate option:  A) 8  B) 9  C) 7  D) 6  E) 5

Rationale: "lcm of 12 = 12 1 / 3 marking are ( table of 4 ) 0 . . . . . . 4 . . . . . . 8 . . . . . 12 ( total = 4 ) 1 / 4 marking are ( table of 3 ) 0 . . . . . . . 3 . . . . . . 6 . . . . . . 9 . . . . . . . . 12 ( total = 5 ) overlapping markings are 0 . . . . . . . . 12 ( total = 2 ) total markings = 4 + 5 - 2 = 7 answer = c"
Answer: C