Important factors in determining the credibility of a health product manufacturer include a. recalls, location, and doctor's recommendation b. location, clinical trials, and quality control c. recalls, location, and quality control d. clinical trials, doctor's recommendation, and quality control

The correct answer among the choices listed is option D. Important factors in determining the credibility of a health product manufacturer include clinical trials, doctor's recommendation, and quality control. These things will prove how effective this health product and with doctor's recommendation people will trust it.