To what extent are the statements in paragraphs 16 and 17 to be taken literally? What function do they serve in Angelou's narrative?

Why are radio observatories located in valleys far away from urban centers? a. to shield them from electromagnetic interference b. to avoid sound pollution c. to avoid disturbing people living in the city d. to shield them from water vapor

When the blood leaves the atria (upper chambers) where does it flow to? a. aorta b. lungs c. ventricles d. rest of the body

Which of the following would be paid for with a state’s capital budget? a) lawmakers’ salaries b) a new bridge c) the salaries of state troopers d) education