Why Is the Range Effect Known as a "Ceiling Effect

Multiple Choice

Why is the range effect known as a "ceiling effect" a problem for researchers?

A) The scores are already so high that there is no chance of measuring improvement.
B) The scores are already so low that there is no chance of measuring a decrease.
C) There is so much room for improvement that the measurements are almost certain to increase.
D) There is so much room for lower performance that the measurements are almost certain to decrease.