Nationwide, the Average Waiting Time Until a Electric Utility Customer

Nationwide, the average waiting time until a electric utility customer service representative answers a call is 210 seconds. The Gigantic Kilowatt Energy Company randomly sampled 30 calls and found that, on average, they were answered in 183 seconds with a population standard deviation of 30 seconds. Can the company claim that they are faster than the average utility at α = 0.05?

A) Yes, because the test value -4.93 falls in the critical region.
B) No, because the test value -0.90 falls in the critical region.
C) Yes, because the test value -0.16 falls in the critical region.
D) No, because the test value -0.16 falls in the critical region.