Kendra watches a television commercial for a new alternative medicine. She is interested in the medicine, but she is unsure if it will really work. Which of the following would give reliable evidence of the medicine's properties?
A:Testimony of well-respected medical professionals supporting the medicine's abilities
B:The fact that the company owns several multi-million dollar research facilities
C: Testimony of many users that the medicine really works
D:Many experimental trials with results that support the claims
