A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 740 hours. A random sample of 26 light bulbs has a mean life of 718 hours. Assume the population is normally distributed and the population standard deviation is 63 hours. At a = 0.05, do you have enough evidence to reject the manufacturer's claim? Complete parts (a) through (e). (a) Identify the null hypothesis and alternative hypothesis. O A. HO: HS718 O B. Ho: H > 740 O C. Ho: H= 718 Ha: H > 718 (claim) Ha: HS740 (claim) Ha: H # 718 (claim) O D. Ho: H