Final answer:
The information provided does not coincide with the multiple-choice options given, as Figure A8 shows bars representing population percentages, not absolute numbers.
Step-by-step explanation:
The question refers to Figure A8 of the U.S. Population with Bar Graphs. Based on the provided information, the correct answer to what each line on the vertical axis represents is not given in the options. The description indicates that there are three representations of population data; however, none of these descriptions state values as low as the options provided.
Specifically, option (c) Bars show total population divided into percentages, suggesting that the units on the vertical axis are percentages, not absolute numbers. Therefore, without additional information or access to the original graph in lesson 1, we are unable to provide a definitive answer to the choice of A: 5 people, B: 10 people, C: 5 million people, or D: 10 million people.