4. The word "they" in line 11 refers to (A) indications (B) fossils (C) dinosaurs (D) characteristics

10. What does the passage mainly discuss? (A) The differences between government and newspaper weather forecasting in the United States. (B) The history of publishing weather maps in United States newspapers (C) A comparison of regional and national weather reporting in the United States. (D) Information that forms the basis for weather forecasting in the United States