A student measures the level of radiation given off by a radioactive sample. The table lists the counter readings she records during a short interval of time: $106$, $96$, $98$, $100$ counts per minute. After the sample is taken away, the counter then gives a background radiation reading of $4$ counts per minute. What is the best estimate of the average count rate from the radioactive sample?
- A$96$ counts per minute
- B$98$ counts per minute
- C$100$ counts per minute
- D$104$ counts per minute