A university is interested in promoting graduates of its honors program by establishing that the mean GPA of these graduates exceeds 5.3. A sample of 42 honors students is taken and is found to have a mean GPA equal to 5.4. The population standard deviation is assumed to equal 0.40. The parameter to be tested is? A. The mean GPA of all university honors students B. The mean GPA of all university students C. The mean GPA of 5.4 for the 42 selected honors students D. The proportion of honors students with a GPA exceeding 5.3