Assume you have a digraph with 5 vertices (A, B, C, D, and E) and 9 arcs. B is incident from D, E, and A; C is incident to E and A and incident from D; E is incident to D and incident from A.Suppose that the vertices of the digraph represent individuals and there is an arc going from vertex X to vertex Y if and only if X "likes" Y. Which of the following statements [A), B), C), or D)] is not true?
A. B and C do not like each other.
B. B does not like A, C, D, or E.
C. A likes B and E but does not like C or D.
D. C likes A but A does not like C.
E. all of these statements are true.
Answer: E
Mathematics
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