To add choices to a combo box content control, which of the following should be done?

A) Modify the content control style.
B) Apply numbering to the content control.
C) Apply a text effect to the content control.
D) Modify the content control properties.

Combo Box Content Control

A user interface element in document design software that combines a text box with a list box, allowing users to select an item from a list or enter a new one.

Content Control Style

Refers to the customization and formatting of placeholders in documents that control the type of content that can be added.

Text Effect

Visual enhancements applied to text, such as shadow, glow, reflection, or 3D appearance.