Which of the following is true?

Which of the following is true?
 
  a. Medical journals will not publish articles on drug research funded by the pharmaceutical industry.
  b. Doctors cannot legally prescribe a drug as treatment for a given condition unless it has been scientifically tested for that specific condition.
  c. Pharmaceutical companies cannot legally market a new and expensive drug unless it differs substantially from older, less expensive drugs.
  d. University-based medical researchers do not accept research funding from the pharmaceutical industry.
  e. none of the above