Which of the following is part of the ethical guidelines for research with animal subjects? 1. Only trained personnel may be involved with the research. 2. Discomfort of the animals must be minimized...

Which of the following is part of the ethical guidelines for research with animal subjects?

1. Only trained personnel may be involved with the research.

2. Discomfort of the animals must be minimized as much as possible.

3. Use of animals and the particular species of animal used must be strongly justified for the study.

4. All of the above.