The lifetime of 100-watt bulbs that a company makes follows a normal distribution, with an average life of 800 hours with a deviation of 120 hours. A sample of 50 bulbs is randomly chosen from a batch and after testing, an average life time of 830 hours is obtained. With a significance level of 1%, the company will carry out a hypothesis test to show that in reality the average lifespan of these bulbs is more than 800 hours. What are the hypotheses to consider for this test?

Select one: a. to. H0: The lifetime of the 100 watt bulbs manufactured by this company is 800 hours. Ha: The lifetime of the 100 watt bulbs that this company makes is less than 800 hours. b. H0: The average life time of the 100 watt bulbs that this company manufactures is 800 hours. Ha: The average life time of the 100 watt bulbs that this company makes is different from 800 hours. c. H0: The lifetime of the 100 watt bulbs manufactured by this company is less than 800 hours. Ha: The lifetime of the 100 watt bulbs that this company makes is more than 800 hours. d. H0: The average life time of the 100 watt bulbs that this company manufactures is 800 hours. Ha: The average life time of the 100 watt bulbs that this company makes is more than 800 hours.