A sub shop has a claim that they can deliver your sub in les

A sub shop has a claim that they can deliver your sub in less than 20 minutes. To test this claim a random selection of 25 delivery times were taken and recorded. The mean of this sample or sample mean was 16 minutes. The standard deviation was 2.5 minutes. Select the proper Hypothesis tests.

(d) is the correct option. If the Null hypothesis is rejected, the Alternate hypothesis has to be accepted.