Q325
A WATS arrangement
A.
is always less expensive than flat-rate service
B.
is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
AnswerC.
is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
D.
is never less expensive than flat-rate service
E.
None of the above
Answer: Option B
Solution
Answer: Option B
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