To answer this question, the user needs to understand the relationship between controls and fields in a database management system.

Controls are used to manage the input, processing, and output of data in a database. Fields, on the other hand, are used to store and organize data in a database.

Now, let's go through each option and explain why it is right or wrong:

A. One control maps to many fields: This option is incorrect because a control is typically associated with one field in a database. For example, a text box control in a form typically corresponds to one field in a database table.

B. Many controls map to one field: This option is incorrect because multiple controls can be associated with one field in a database. For example, a drop-down list and a radio button group may both correspond to one field in a database table.

C. Many controls map to many fields: This option is also incorrect because each control is typically associated with one field in a database. A database may have many controls and many fields, but each control is generally associated with only one field.

D. One control maps to one field: This option is correct. Typically, one control is associated with one field in a database. For example, a text box control may be used to enter data into one field in a database table.

Therefore, the correct answer is:

The Answer is: D