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: Reheated Bagle smokes out antivirus defenses A new version of the fast-spreading Bagle mass-mailing worm was discovered Friday, with its threat level quickly rising to a moderate level, according to security experts.

Sci/Tech