What Was an Example of the Challenges Created by No

What was an example of the challenges created by No Child Left Behind?

A) There was no incentive for schools or teachers to change their practices because funding was fixed.
B) Teachers felt pressure to "teach to the test" so that they could improve scores for their schools even if they were not covering other important material for their students.
C) States had no control or flexibility in planning how to address achievement gaps in their schools as everything was standardized at the federal level.
D) Decisions and policies were not informed by research.