Answer: The fact that a doctor doesn't know what a Rorschach Test is
C, it talks about how, " That on the ashes of which his youth doth lie" meaning that his youth has burnt out, and "In me thou see'st the glowing of such fire" If you think about it, the flame is Shakespeare, and the "ashes of his youth" mean his life. He knows about approaching death " The deathbed whereon it must expire", and he has excepted it.
Having extra things to help you present can help you be more confident. They also makes you less nervous because you have more than just the presentation itself to relay on.
Objects that have a meaning to them