A Psychologist Tests a Group of Students with an Intelligence

A psychologist tests a group of students with an intelligence test. After 6 months she retests the same group of students with the same intelligence test and finds that there is a high correlation (+.85) between each student's pair of scores over the 6-month interval. Based on her findings we can conclude that the intelligence test has

A) good face validity.
B) poor interjudge reliability.
C) inadequate construct validity.
D) good test-retest reliability.
E) poor internal consistency.