Detailed Instructions: In this task, you're given a short article. Your job is to classify the article based on its category. Use the following classification labels, 0. World, 1. Sports, 2. Business, 3. Science or Technical. Label the text "0" if it contains information related to world. Label the text "1" if it contains information related to sports. Label the text "2" if it contains information related business. Label the text "3" if it contains science or technical related information. 
Q: Crude Oil Retreats From $53 Threshold Oil retreated in Asian trade today, but players in the market remained edgy about tight supplies heading into North America's winter heating season.
A:
2