It Has Been Hypothesized That on Average Employees Spend One

It has been hypothesized that on average employees spend one hour a day playing video games at work. To test this claim, a manager takes a random sample of 35 employees who showed a mean time of 55 minutes per day with a standard deviation of 5 minutes.
-How would you define the rejection region for this test at ? = .01?

A) t > 2.575
B) t > 2.33
C) t > 1.96 and t < -1.96
D) t > 3.29 and t < -3.29
E) t > 2.728 and t < -2.728