challenge: What was the origin of Edward Sadlowski's nickname 'Oil can Eddie'?
  
  A. He often carried an oil can while walking around plants and talking with rank-and-file members
  B. He was responsible for maintaining the oil supply in the plant
  C. He was nicknamed by his coworkers for his love of oil-based foods
  D. He was known for his ability to fix oil leaks in machinery
  Answer: 