The. . . . . . . . control lets the user selects or unselects an option we can select more than one option from the group.

combo box
checkbox
radio
text

The correct answer is B. checkbox.

A checkbox is a type of control that allows the user to select or unselect an option. The user can select more than one option from a group of checkboxes.

A combo box is a type of control that allows the user to select an option from a list. The user can only select one option from a combo box.

A radio button is a type of control that allows the user to select one option from a group of options. The user can only select one option from a group of radio buttons.

A text box is a type of control that allows the user to enter text.

Here is a diagram that shows the different types of controls:

The checkbox is the only control that allows the user to select more than one option from a group.