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I didn't even think about the motor part during the question, but it might be related to the homonculus (FA 2020 pg 502). Motor and sensory areas of the lower face generally fall towards the lower half of the brain. Answers B/C/D would probably show some hand or arm involvement.
I know this isnt a great answer, but I was assuming that they wanted us to "play the game" and decide broca/wernicke. It seems set up for us answering that type of question. Going off buzzwords like "fluency", "phrase length", "comphrension".