$15\mathrm{.}8\mathrm{.}1$: Use the addChoice method to add any needed instance variables.

$597714\mathrm{.}2988516.$qx$3$zqy$7$

Provide a different implementation of ChoiceQuestion. Instead of storing the choices in an array list, the addChoice method should add the choice to the question text. For this purpose, an addLine method has been added to the Question class.