Which of the Following Statements About Practice Directions Are TRUE

Which of the following statements about practice directions are TRUE?

A) They tell parties and their representatives what the court will expect of them in respect of documents to be filed in court for a particular purpose, and how they must
B) They follow all previous practice directions in relation to civil process
C) They play an important role in the new civil process
D) They supplement the CPR, giving the latter fine detail
E) They tell the parties what they can expect of the court