What is the probability of randomly selecting one of the shortest diagonals from all the diagonals of a regular 11-sided polygon)? Choices:
A) 1 / 2 B) 1 / 3 C) 1 / 4 D) 1 / 8 E) 1 / 11

Rationale: "from any vertex , there are two vertices on sides , which do not make a diagonal but a side . so the remaining n - 3 vertices make diagonals . there are 2 of these diagonals which are the shortest . the probability of choosing one of the shortest diagonals is 2 / 8 = 1 / 4 . the answer is c ."
Answer: C