In a Significant Regression Model Determining If There Is a Relationship

In a significant regression model determining if there is a relationship between college GPA and sales performance (number of units sold in the previous month) , the 95% confidence interval for the number of units sold when GPA = 3.00 was
Determined to be 20.914 to 22.657. The correct interpretation is

A) We can be 95% confident that the number of units sold per month by a particular Salesperson with a college GPA of 3.00 is between 20.914 and 22.657 units.
B) We can be 95% confident that the average number of units sold per month by Salespersons with a college GPA of 3.00 is between 20.914 and 22.657 units.
C) The number of units sold per month by a salesperson with a college GPA of 3.00 Will be between 20.914 and 22.657 units 95% of the time.
D) 95% of the time the average number of units sold per month will be between 20.914 and 22.657 units.
E) We can be 95% confident that each month between 20.914 and 22.657 units will Be sold.