问题详情

It can be inferred that ______.
A．over one-tenth of American population have difficulty in using and writing skills in everyday situations
B．in North America nation-wide tests are given to test pupils" functional literacy
C．Canadians are generally at a higher level of functional literacy than Americans are
D．teaching of English reading and writing has turned out to be a failure in Canada and the U.S.请帮忙给出正确答案和分析，谢谢！