For the following question(s), refer to the digraph below.
Suppose that the vertices of the digraph represent basketball teams playing in a tournament and the arcs represent games already played. An arc going from vertex X to vertex Y means that team X beat team Y. (No ties are possible in basketball.) Which of the following statements [A), B), C), or D)] is not true?
A. A defeated B and C but lost to E.
B. B played a total of 5 games, winning 2 and losing 3.
C. D and C were the only two teams that did not play each other.
D. B and C were the only two teams that played each other twice.
E. all of these statements are true.
Answer: C
Mathematics
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