3. The author mentions two researchers' studies (lines22- 25) most likely in order to

　　(A) suggest that children's political attitudes are formed primarily through textbooks

　　(B) counter the claim that children are able to see through stereotypes in textbooks

　　(C) suggest that younger children tend to interpret the messages in textbooks more literally than do older children

　　(D) demonstrate that textbooks carry political messages meant to influence their readers

　　(E) prove that textbooks are not biased in terms of their political presentations

　　4. The author's attitude toward the content of the history textbooks discussed in the passage is best described as one of

　　(A) indifference

　　(B) hesitance

　　(C) neutrality

　　(D) amusement

　　(E) disapproval

　　5. It can be inferred from the passage that the researchers mentioned in line 19 would be most likely to agree with which of the following statements?

　　(A) Students form attitudes about cultures other than their own primarily inside the school

　   (B) For the most part, seniors in high school know that textbooks can be biased.

　　(C) Textbooks play a crucial role in shaping the attitudes and beliefs of students.

　　(D) Elementary school students are as likely to recognize biases in textbooks as are high school students.

　　(E) Students are less likely to give credence to history textbooks than to mathematics textbooks.

　　6. The author implies tha5t which of the following will occur if textbooks are not carefully reviewed?

　　(A) Children will remain ignorant of the European settlers' conquest of the New World.

　　(B) Children will lose their ability to recognize biases in textbooks.

　　(C) Children will form negative stereotypes of Native Americans.

　　(D) Children will develop an understanding of ethnocentrism.

　　(E) Children will stop taking textbooks seriously.