Answer: An advanced organizer
Explanation:
An advanced organizer is one of the type of method that is used for introducing and outline the important lessons and different types of topic that helps in illustrating the relation between the information and the student.
The main objective of an advance organizer is that it given small overview about the topics in an organization that helps in the subsequent learning process.
According to the given question, the student orientation process is basically referred as an advanced organizer where the students are given a brief introduction about the specific historical period.
Therefore, An advanced organizer is the correct answer.