The amount of carbon-15 in a given sample decays exponentially with time. If the function C(m)=100 24m models the amount of carbon remaining in the sample after m minutes, which the following must be true? A) The amount of carbon in the sample halves minute. B) The amount of carbon in the sample halves 24 minutes. C) The amount of carbon in the sample have 24 times every minute. D) The amount of carbon in the sample reduce factor of 24 every 2 minutes,