A Cox regression survival analysis was applied in order to model the mortality for a group of patients diagnosed with a disease, using treatment and age as explanatory or independent variables. The results of the analysis are presented below. What is the interpretation of the hazard ratio for Age?

a.The exponential coefficient for age, 1.247 indicates that a patient 1 year older than another patient, both given the same treatment, has an increased risk of dying by a factor of 1.247

b.The exponential coefficient for age, 1.247 indicates that a patient 1 year older than another patient, both given the same treatment, has an increased risk of dying by a factor of 0.247

c.The hazard ratio for Age is 0.220 and is not statistically significantd.The hazard ratio for Age is -1.887.