An expert witness can give an opinion in which the following situations.
a. The opinion, inferences, or conclusions depend on special knowledge, skills, or training not within the ordinary experience of lay people
b. The witness is shown to be qualified as a true expert in the field
c. The witness testifies to a reasonable degree of certainty (probability) about his or her opinion, inference, or conclusion.
d. All of the above
Answer: d. All of the above