In Selecting Expert Witnesses

In selecting expert witnesses:

A) the court may not select a witness as an expert unless the witness has a degree or license.
B) under no conditions and in no jurisdictions may the judge on his or her own motion appoint an expert witness.
C) the expert is appointed without any preliminary questions by the opposing party because this would be prejudicial.
D) it is incumbent upon the party offering the witness to show that the witness possesses the necessary learning, knowledge, skills, or practical experience to enable him or her to give opinion testimony.