Under what circumstances would these alternatives be able to replace animal testing, with the current technology

Review the following websites: People for the Ethical Treatment of Animals (PETA) and Americans for Medical Progress. What are the guidelines to conduct research on animals ethically? What do you find to be the importance to the “Three R’s”? What are the alternatives to using animals for testing? Under what circumstances would these alternatives be able to replace animal testing, with the current technology? Ensure to cite sources, relying on your textbook and scholarly sources for your response.