challenge: What was the outcome of the investigation of the HMS D5 wreck site by Wessex Archaeology in 2016?
  
  A. The wreck was designated as a protected site by Historic England
  B. The wreck was determined to be sufficiently buried and not at risk, and designation was not pursued
  C. The wreck was found to be at risk of damage and required immediate conservation
  D. The investigation was inconclusive and further study was recommended
  Answer: 