What is the relationship between age-specific mortality and age-specific survivorship?
a. age-specific mortality is the proportion of individuals alive at the start of an age interval; age-specific
survivorship is the proportion that die before the start of the next interval
b. age-specific survivorship is the proportion of individuals alive at the start of an age interval that die during the
age interval; age-specific mortality is the proportion that survive until the start of the next interval
c. the sum of age-specific mortality and age-specific survivorship always equals 1
d. the sum of age-specific mortality and age-specific survivorship always equals 1
e. age-specific survivorship is always greater than 1
ANSWER: c
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