Which Statement Best Describes Acceptable Levels of Test Reliability

Multiple Choice

Which statement best describes acceptable levels of test reliability

A)  Reliability estimates must be equal to or higher than 0.50. 
B)  Reliability estimates must be equal to or higher than 0.70. 
C)  Reliability estimates must be 0.50 or higher for a personality test, and 0.70 or higher for a test of mental ability. 
D)  There are no absolute guidelines about acceptable levels of reliability.