Which of These Is NOT a Rule of Thumb When

Multiple Choice

Which of these is NOT a rule of thumb when using product positioning as a strategy-implementation tool?

A) "The best opportunity might be an unserved segment."
B) "Look for the hole or vacant niche."
C) "Try to serve more than one segment with the same strategy."
D) "Don't position yourself in the middle of the map."
E) All of these are valid rules of thumb.