To Become Certified in His State, Bill Had to Pass

To become certified in his state, Bill had to pass a test that included reading, writing, and mathematics. What is the reasoning that is most likely to have led to this requirement?

A) Prospective teachers who know they do not perform well in those subjects are less likely to seek certification in that state.
B) Teachers must be competent in basic skill areas if they are to perform effectively in their jobs.
C) Testing requirements help to reduce the teaching force during times of excess supply and low demand.
D) Reading, writing, and math performance are closely associated statistically with on-the-job measures of teaching effectiveness.