When expert testimony is presented to the jury

A. as in the case of non-expert witnesses, hypothetical questions cannot be asked.

B. testimony of the expert witness may be based on a hypothetical question addressed to him or her.

C. the expert may not base his or her opinion partly on facts of his or her own observation and partly on factual evidence of other witnesses presented hypothetically.

D. such testimony of the expert cannot be based on his or her own personal knowledge or observations.