An application form for a database requires that the entered values are of the Integer data type.

Alphanumeric characters include both letters and numbers, which can represent a wide range of values beyond just whole numbers. This option does not conform to the Integer data type, as it allows for letters and symbols, which are not compatible with the requirement for whole numbers.

The terms "true" and "false" represent Boolean values, which are used for logical operations rather than numerical values. Since the Integer data type does not encompass Boolean values, this choice is not applicable to the requirements of the application form.

Decimal values refer to numbers that contain fractions, typically represented with a point (e.g., 3.14). This directly contradicts the definition of the Integer data type, which strictly includes only whole numbers without any decimal or fractional parts.