LSAT-11-4-1，请教

kingsoft

     the passage argues that because physicians can not judge what degree of thoroughness of medical checkup is appropriate, patients may not go to hospital to get regular examination when they do not feel ill

     we are asked to identify the reason to weaken the argument

     A tell us that some serious diseases can be easily detected in their early stages, that is to say,  for these serious diseases, any degree of thoroughness of medical checkup is viable for patients

      i do not think choice E consists with the intention of ETS. critical reasoning(批判性思维)