The curriculum since the 1960s includes a much stronger emphasis on science and math than existed before that time. Of the following, what is the most likely reason for this increased emphasis?
◦ The federal influence on the curriculum through the passage of specific pieces of legislation
◦ The state influence on education through statewide testing in the area of environmental education
◦ The local district influence on the curriculum through the expression of districts' missions
◦ The influence of textbooks on the curriculum, because more environmental education textbooks now exist than did before the early 1990s