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: Phone Choices May Affect Polls Political polling outfits exclude cell phone users from this year's presidential surveys. But a new survey indicates that mobile phone users are a distinct voting group whose ballot preferences might not be reflected in traditional polls. By Elisa Batista.

Sci/Tech