The two major stages of the investigation process are the preliminary investigation and the follow-up investigation.

1. Are the two major stages of the investigation process the preliminary investigation and the follow-up investigation?

2. What are process the preliminary investigation and the follow-up investigation?

3. What are the two major stages of the investigation process?

4. Are the two or three major stages of the investigation process the preliminary investigation and the follow-up investigation?

    Are the two major stages or branches of the investigation process the preliminary investigation and the follow-up investigation?

    Are the two major stages of the investigation process or process of training the preliminary investigation and the follow-up investigation?

5.The two major stages of the investigation process the preliminary investigation and the follow-up investigation, aren't they?