Human Teeth Are Useful in Determining the Age at Which

Human teeth are useful in determining the age at which an individual died because:

A) the enamel forms in layers, one of which is deposited for approximately each year of life
B) the teeth erupt in a known sequence at more or less fixed points in an individual's life
C) the teeth fall out in a fixed sequence during an individual's life
D) the human teeth are NOT useful in determining the age at which an individual died