Four Students Have Applied to a Special Program and Only

Multiple Choice

Four students have applied to a special program and only one can be accepted.They have taken a battery of 12 tests and all have exactly the same average score.The standard deviation of their test scores are: Student A = 3.12,Student B = 0.27,Student C = 13.45,Student D = 6.45.If consistency of performance is a criteria for acceptance,which of the four students should be selected?

A) A
B) B
C) C
D) D