To create this, you enter an expression in the design grid that instructs access to perform a calculation using the current field values.

The correct answer is: D. Calculated field

A calculated field is a field that contains a formula that is based on the values of other fields in the table. Calculated fields are created in the Design view of a table. To create a calculated field, you enter an expression in the Field Name column of the Design grid. The expression can include field names, operators, and constants.

A formula field is a field that contains a formula that is based on the values of other fields in the table. Formula fields are created in the Design view of a table. To create a formula field, you enter an expression in the Field Name column of the Design grid. The expression can include field names, operators, and constants.

A numeric field is a field that stores numbers. Numeric fields can be used to store integers, decimal numbers, and currency values.

A formulated field is not a valid option.