题目

Americans are buying more products and services than ever before through the Internet. And experts say the popularity of online sales is likely to spread to other countries. Online sales now represent as much as one­tenth of all retail sales in the United States. This has led traditional stores to seek new ways to keep their customers loyal. Lynne Shaner used the Internet to buy everything she needed. Other than food, 90%of her purchases were made on her home computer. She said “I find that by being able to go online and choose the things that I need to choose, and have them deliver下列图象中可作为函数图象的是（ ）A. B. C. D.