The correct answer is C. query.
A global join is a type of join that occurs when two or more tables are joined together in a query. The tables are joined on a common field, and the results of the join are returned in a single table.
A form is a user interface element that allows users to enter data into a database. A report is a document that summarizes data from a database. A field is a column in a table.
A global join is not created automatically when using tables in a form or a report. It is only created when using tables in a query.