Which control do you use to add a report to another report?

A) text box
B) subform/subreport
C) tab control
D) chart

Subform/subreport is the best choice for adding a report to another report, as it allows for a structured and organized display of data from multiple reports while still maintaining their individual formatting and data sources. Text boxes only display simple data and cannot handle complex reports, while tab controls and charts are used for organizing and displaying data in a particular format and don't allow for the inclusion of a separate report.