What would be the best way to show people how the quality of the river’s water has improved since the nineteenth century?
a) read an excerpt from one of edmund spenser’s poems about the beauty of the river
b) provide graphs that show that millions of citizens use the river for recreation every day
c) compare pictures of the river during the nineteenth century with pictures of the river today
d) describe the increase in fish in the river since the clean-up efforts in the twentieth century