What is the run-time behavior of the form?

The user must be able to invoke a list of values for valid sales representative in the Orders form. To facilitate this, you created a button and positioned it next to the Sales Rep Id field.
The text item has these properties set:
– Required: Yes
– List of Values: SALES_REP_LOV
– Validate from List: No
. . .
The button has these properties set:
– Keyboard Navigable: Yes
– Mouse Navigate: Yes
– Iconic: Yes
– Icon Filename: list.ico
. . .
An appropriate LOV has been created (called SALES_REP_LOV) and associated with the text item. An icon file (list.gif) exists in the appropriate directory. All other properties are left at their defaults. You write a When-Button-Pressed trigger at the item level with this code:
LIST_VALUES;
To test the form, you attempt to enter a new record.
What is the run-time behavior of the form?

A.
The form doesn’t compile and therefore cannot be tested.

B.
The icon is not displayed on the button.
When you click the Sales Rep Id field and then click the button, the LOV is invoked.

C.
The icon is displayed on the button.
When you click in the Sales Rep Id field and then click the button, the LOV is not invoked and an error is reported.

D.
The icon is not displayed on the button.
When you click in the Sales Rep Id field and then click the button, the LOV is not invoked and an error is reported.

E.
The icon is displayed on the button.
When you click in the Sales Rep Id field and then click the button, the LOV is invoked.