The Prices (In Dollars) for a Graphing Calculator Are Shown $122.5 < \mu < 135.5$

The prices (in dollars) for a graphing calculator are shown below for 8 online vendors. Estimate the true mean price for this particular calculator with 95% confidence.
121 125 151 129
127 133 121 125

A) $122.5 < \mu < 135.5$
B) $116.9 < \mu < 141.1$
C) $120.9 < \mu < 137.1$
D) $126.1 < \mu < 131.9$