The test question asks for a translation of "Jacques est descendu du haricot magique." The answer that is marked as correct is "Jack got off the beanstalk." This answer is not accepted: "Jack climbed down the beanstalk." Had the translation said "Jack climbed down FROM the beanstalk"would that be correct?
If that translation is correct, I would change the answer choices. The correct answer "Jack got off the beanstalk" is just not very intuitive for the ears of this English speaker. That's not what Jack does. He climbs down the beanstalk in the story. It sounds funny to have someone getting off a beanstalk. That's just not like getting off an airplane, for example.