Kelloggs cereal company regularly tests its production line

Question

Kellogg's cereal company regularly tests its production line to ensure the accuracy of the loading mechanisms.  From a population of cereal boxes marked "12 ounces," a random sample of [n=16 boxes] is selected and the contents of each box is weighed.  The sample revealed a sample mean of [x=11.7 ounces], with a standard deviation [s=0.8 ounces].  Test to see if the population mean [Mu] is at least 12 ounces.  Use a 0.05 level of significance.

a. Reject H_o:     t of 1.753 > -1.500

b. Reject H_o:     t of -1.500 < -1.753

c. Do not reject H_o:     t of -1.645 > -1.753

d. Do not reject H_o:     t of -1.500 < 1.753

e. None of the above answers is correct.