exerciseModelClassID|exercise2.choice.ChoiceExerciseModel
submissionModelClassID|exercise2.choice.ChoiceSubmissionModel
solutionModelClassID|exercise2.choice.ChoiceSolutionModel
exerciseBodyClassID|exercise2.choice.ChoiceBody
prompt|If changing the state of the red square doesn't guarantee that the blue square will change state, then in which of these senses does it "cause" the state of the blue square?  Check ALL that apply.
type|1
numChoices|4
choice_0|You must change the red square's state in order to change the blue square's state.
choice_1|The red square changing state is usually responsible for the blue square changing state.
choice_2|Changes in the red square guarantee changed in the blue square.
choice_3|None of the above.
answer_0|true
answer_1|true
answer_2|false
answer_3|false