阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。
Tim Richter and his wife, Linda, had taught for over 30 years near Buffalo, New York—he in computers, she in special education. “Teaching means everything to us, " Tim would say. In April 1998, he learned he would need a heart operation. It was the kind of news that leads to some serious thinking about life’s purpose.
Not long after the surgery, Tim saw a brochure describing Imagination Library, a program started by Dolly Parton’s foundation(基金会) that mailed a book every month to children from birth to age five in the singer’s home town of Sevier, Tennessee. “I thought, maybe Linda and I could do something like this when we retire, “ Tim recalls. He placed the brochure on his desk, “as a reminder. "
