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: Singapore investigates China firm SINGAPORE China Aviation Oil (Singapore), which this week asked Singapore #39;s high court for protection from creditors after disclosing \$550 million of losses, is being investigated by the Commercial Affairs Department, Singapore #39;s white-collar crime unit 

Business