An instructor wanted to develop a confidence interval for the mean GPA of the students in his class. He used the campus records system to obtain all their GPA's and computed the 95% interval as (2.32, 2.87). If he wants to use this interval to describe the students in his class
A. He's 95% confident the interval contains the real average GPA.
B. There's a 5% chance the interval is wrong.
C. He didn't need an interval after all.