Which of the following statements are correct about the ethical issues of alternative organ sources?

A、Theadvanceofmedicaltechnologyinorgantransplantationhasraisedadditionalissuesofmedicalethics.;
B、Theuseofalternativeorgansourcesshouldalsominimizetheriskontherecipients.;
C、Someofthedonorsaretheanimals,soethicalissuescanbeignoredinthiscase.;
D、Theuseofthealternativeorgansourcesshouldbeconsideredcompletelymedicallyandethically.