At a telephone enquiry system,the number of phone calls regarding relevant enquiries follows a Poisson distribution with an average of $5$ phone calls during $10$-minute time intervals. The probability that there is at most one phone call during a $10$-minute time period is:
- A$6e^{-5}$
- B$5e^{-5}$
- C$e^{-5}$
- D$4e^{-5}$
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