D. all the truly good things in the outside world.
Explanation:
Sears Roebuck company was established by Richard Sears and Alvah Roebuck. Their mode of operation was the sale of different types of jewelry through the use of mail. He delivered these goods to very remote parts of the country which had no access to retail stores.
This made the author to use Sears Roebuck catalog as a symbol for all the truly good things in the outside world in relation to the rural dwellers perception at that point in time.
