The author's attitude toward Bachofen' s treatise is best described as one of ______.

A．as he becomes older
B．if his immune system does not work properly
C．when the cells of his brain and spinal chord decline
D．when the cells in his kidneys decline in number

A．the changes inside human bodies are more important than exterior ones
B．the loss of competence is more significant than that of cells
C．the shrinkage of muscles is more significant than the decline in height
D．the thinning of hair is less important than the wrinkling of skin