QUESTIONS 13–17 ARE BASED ON THE FOLLOWING PASSAGE.D.DUE TO ITS LOCATI...

17. The main purpose of paragraph 3 is tonomena in the history of mankind, beginning withThomas Edison’s invention of the incandescent lighta.define dualityas it relates to businesstransactions.bulb. Before this invention, cities were illuminatedfirst by torches and then by gaslight, neither of whichb.describe the double-entry system in keepingcontributed much to the overall brightening of thetrack of financial transactions.night sky.c. describe the common yardstick used to meas-(3) Not only is light pollution a nuisance buture financial transactions.it is also harmful to life forms whose rhythmsd.outline the evolution of the double-entrydepend on celestial events. Birds migrating at nightsystem since the Renaissance.use stars to navigate and can become lost when fly-ing through a heavily light polluted region that