单项选择题

Passage Two
Questions 57 to 61 are based on the following passage.
There is something badly wrong with the way standards for school science being set in the US. When the Texas State Board of Education voted in new standards last week, it left the door open for teaching creationism (特创论) in the name of science in federally funded schools. These must be closed, and quickly.
Because standards are set at state level, students in one state might be learning different science and using different textbooks from what students in another are learning and using. What is worse, the state boards of education that are responsible for standards and textbooks are made up of elected officials who lack any specific skills or qualifications in the relevant areas of science or education. As we saw in the 2005 trial over teaching intelligent design in Dover, Pennsylvania, and are now seeing in Texas, school boards have become a political battleground. Many board members appear to Ne acting on behalf of religious groups like local churches or the Discovery Institute.
School science standards should be set by people who understand science and science education. At the same time, it is dangerous to argue that the powers of democratically elected officials should be taken away if they don’t produce the outcome you want. Yet that is what may happen in Texas. Some Democrats have introduced legislation that would transfer authority for textbooks and curricula to the Texas Education Agency.
Is there a way out of this impasse One possibility is that candidates for school boards should be tested before they stand. Another is for the pro-science (支持科学者) try to engage more fully with the democratic process. After the Dover trial, board members who favored intelligent design were dumped by the voters. Something similar could happen in Texas.
Another possibility is to push decisions further up the democratic ladder. President Barack Obama has already called for all states to have the same achievement standards, raising hopes that he might push for federal standards across all US schools. While this might drive conservative mad, it would put an end to the present situation in which an accident of geography can determine whether a child is taught valid science.
Obama has already made remarkable changes in Washington by restoring scientific expertise to its rightful place in government. Many teachers and scientists would like to see him do the same in the place where it can count most: in the classroom.
What is the main idea of the passage

A.The way of the school standards setting of US is badly wrong.
B.American school standards vary from state to state.
C.America should have a national school standard set by experts.
D.President Obama makes active policies on school standards in US.
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