Read the following passage carefully and answer the question that follow, by selecting the correct corresponding option. Haider the tailor, has a shop in Hyderabad. It has been around for more than twenty years. Haider starts work at seven o'clock every morning. He closes the shop only at ten o'clock at night. He has a variety of cloth. Most of it is for making suits and gowns. He has many custormers. They like the clothes that he makes, because they fit them very well. The big stores sell many different styles of clothing. The clothes are not very expensive too. However, many people still want Haider to sew their clothes because he uses materials of good quality. He also helps his customers to design clothes that suit them. Haider has been working as a tailor for _________.

• A.  a short time       
• B.     a long time  
• C.  the past twenty days  
• D.  the past twenty months