Please answer the following question: I'm taking a test and have to guess the right answer to the question after the article. Article: The first time I went for a walk around my father-in-law's neighborhood was garbage day, and I was shocked to see what people were throwing out. It was back in 1981, and I saw many people gathered in someone's front yard. As I went nearer to see what was happening I got my first introduction to yard sales. For the few dollars I had in my wallet, I was able to buy a seven-inch black-and-white portable TV. I also bought a flashlight. The following weekend, at another yard sale, I saw a 14-inch color1 TV being sold for almost nothing. I felt I could not miss the offer and bought it. Now I had two sets and couldn't wait to see what else I could afford the next weekend. Spring ended, and by then I had accumulated almost every type of electronic equipment I had always wished to have back home. Then this new idea came to mind. I had heard about a man who traveled back home every few months. He drove a truck filled with boxes of new and used stuff that people were sending to s. So I told my father that I would send as many types of items as I could so that he could start his resale business. Every few months I would gather several boxes of American "junk" --- televisions, toasters, fans, hair dryers, etc. and send them home. As word got out about my father's "trash" market, people all came to buy these things. Three years later, when I visited my family for the first time since leaving home, I learned that many of the families in our neighborhood had a piece of "trash". It proved that I had the responsibility to keep people back home up to date with the latest technology you no longer need.(304words) Question: According to the text, a yard sale is a place where people _ . Options: A: sell their front yards at a low price B: throw away their trash in someone's yard C: gather in someone's yard to enjoy things D: sell unwanted things in their own yards
A:
D