The second workaround is to add a slightly more elaborate html code to each choice and to modify the CSS.
In this example, the question behaves as follows. To eliminate a choice description, click on it or uncheck the checkbox and it will get grayed out, click on it again or check the checkbox to reset the choice description to black. For no elimination, click the radio buttons. Make sure that the desired radio button is selected before clicking "Check".
This behavior is achieved by modifying the CSS and the choices as follows: