What was one development in education policy during the 20th and 21 st centuries?

Answer:
D
Explanation:
Schools and universities are given with the freedom to regulate their teaching methods, but the government felt that it's necessary to oversee the quality of these schools and universities. Standardized testing was made to ensure that all universities follow a certain quality standard in their programs without taking much of their freedom in teaching the students.
(D) The federal government worked with state and local governments to improve schools.
Therefore, the correct option is (D).
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