Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: Greenspan-Aged Population to Hit Finances  JACKSON HOLE, Wyo (Reuters) - Rising pressure on U.S.  finances from an aging population make it vital quickly fix the  social safety net with such steps as raising the age for full  retirement benefits, Federal Reserve Chairman Alan Greenspan  said on Friday.

Business