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

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.

- "the past is made of multitudinous items ranging from anything that can be collected, recollected or assessed to originate in the past. as such, the past is a gallimaufry of particulars that may not have been related in any way. however, the human mind seeks organization to understand concepts and other things. the human mind therefore seeks relationships in explaining and studying the past. history being a humanity, dictates that historians have to serve this human trait by bringing structure to details of the past. historians do this by creating interpretive frameworks that capture as many details as possible."

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the answers is b.   environments.