Applicants for a Particular Job,which Involves Extensive Travel in Spanish-Speaking

Applicants for a particular job,which involves extensive travel in Spanish-speaking countries,must take a proficiency test in Spanish.The sample data below were obtained in a study of the relationship between the numbers of years applicants have studied Spanish and their score on the test.A 95% confidence interval for the mean score of all applicants who have studied Spanish for 2.5 years was determined to be (53.0,64.6) .Give an interpretation of this interval.
Dependent variable is: Score
R-squared = 83.0%
S = 5.65138 with 10 - 2 = 8 degrees of freedom

A) Based on this regression,we are 95% confident that applicants will score between 53.0 and 64.6 points higher on the proficiency test for each additional year spent studying Spanish.
B) Based on this regression,we are 95% confident that all applicants who have studied Spanish for 2.5 years will average between 53.0 and 64.6 points on the proficiency test.
C) Based on this regression,we are 95% confident an applicant who has studied Spanish for 2.5 years will score between 53.0 and 64.6 points on the proficiency test.
D) Based on this regression,95% of all random samples will have an average score between 53.0 and 64.6 points on the proficiency test.
E) Based on this regression,we are 95% confident that a randomly selected applicant who has studied Spanish for 2.5 years will score between 53.0 and 64.6 points on the proficiency test.