Because a Person's True Abilities Can Change Between Two Administrations

Multiple Choice

Because a person's true abilities can change between two administrations of a test, it is generally true that

A) test-retest procedures cannot produce good reliability estimates.
B) the shorter the time between the two administrations, the higher the reliability.
C) the length of time between two administrations has little effect on reliability.
D) a test developer needs to calculate coefficient alpha to estimate stability.