Which SQL statement joins three tables: Volunteer, Registration, and Activity Registration?

The first choice successfully outlines the SQL statement that performs the necessary joins on the three tables: Volunteer, Registration, and Activity Registration.

In SQL, when you want to combine data from multiple tables, you typically use JOIN clauses to specify how the tables are related to one another. The statement begins with selecting all columns using SELECT *, which indicates the intention to retrieve all available information from the combined data sources.

It specifically establishes a join between the Volunteer and Registration tables based on the VolunteerID, which is a common key between those two tables, ensuring that the data associated with each volunteer corresponds to their respective registrations. Following that, it continues to join the Activity_Registration table on the Registration_ID. This loop through the stages of joining correctly enhances the query to collect comprehensive information about volunteers and their specific registrations in activities.

The other options do not fully address the requirement to join all three tables in a manner that retrieves complete data. Some statements either leave out necessary JOIN syntax or only retrieve a portion of the necessary data without adequately linking all three tables together using appropriate keys, which is crucial for relational data integrity and comprehensiveness. Therefore, the selected option stands out as it correctly implements the necessary joins.