human
The instruction is: Given a reference text about the incudomalleolar joint, tell me its main function.
The reference is: The function of the incudomalleolar joint is to transfer vibrations between the ossicles in the middle ear.
Score the outputs of the systems below from 1 being best to 6 being worst based on the reference. Ratings should only be given from numbers 1 through 6. Only give the rankings with no additional text:

System F: The incudomalleolar joint (more correctly called incudomallear joint) or articulatio incudomallearis is a small synovial joint between the malleus (hammer) and the incus (anvil).
System D: The incudomalleolar joint (more correctly called incudomallear joint) or articulatio incudomallearis is a small synovial joint between the malleus (hammer) and the incus (anvil). 
System C: transfer vibrations between the ossicles
System E: The incudomalleolar joint (more correctly called incudomallear joint) or articulatio incudomallearis is a small synovial joint between the malleus (hammer) and the incus (anvil). 
System B: The main function of the incudomalleolar joint (or articulatio incudomallearis) is to transfer vibrations between the ossicles in the middle ear, which is perceived as sound.
System A: The main function of the incudomalleolar joint is to transfer vibrations between the ossicles in the middle ear, which is perceived as sound.

            Please output in the format strictly and each system should have a distinct rating:
            System A: 
            System B: 
            System C: 
            System D: 
            System E: 
            System F:
gpt
--- Reasoning ---
1. Is the question multiple-choice question?
No
2. Is it implied multiple-choice question?
No
3. If two experts were independently asked the question, will the final answer be exactly the same?
Yes

--- Answer ---
grounded