Taking in consideration that the excerpts are divided as follows:
a. So it had been from the days many years ago when the first settlers raised their houses, sank their wells, and built their barns.
b. The town lay in the midst of a checkerboard of prosperous farms, with fields of grain and hillsides of orchards where, in spring, white clouds of bloom drifted above the green fields. In autumn, oak and maple and birch set up a blaze of color that flamed and flickered across a backdrop of pines.
c. The countryside was, in fact, famous for the abundance and variety of its bird life, and when the flood of migrants was pouring through in spring and fall people traveled from great distances to observe them.
d. Yet every one of these disasters has actually happened somewhere, and many real communities have already suffered a substantial number of them. A grim specter has crept upon us almost unnoticed, and this imagined tragedy may easily become a stark reality we all shall know.
In Silent Spring, the author communicates the effects of pesticides in the environment. In A Fable for Tomorrow, Carson makes us fall in love with a town by describing such a beautiful picture of it in her text. After such a thorough description, she then starts telling of the illness that overtook the town, and how it made the beauty go away. Finally, she ends up saying that this town is fictitious, but the illness that killed it is not, that this illness has somehow manifested in various ways across the country. She ends the chapter by making the reader reflect on how this could be part of their reality. Therefore, your best answer is option D.