challenge: According to estimates, how much is the rate of coastal erosion in Yorkshire expected to increase by 2100 due to rising sea levels?
  
  A. Between five and ten times the early 21st century rate of erosion
  B. Between ten and fifteen times the early 21st century rate of erosion
  C. Between one and three times the early 21st century rate of erosion
  D. Between three and seven times the early 21st century rate of erosion
  Answer: 