Assertion (A): The crude death rate of a developed country may be higher than that of a developing country. Reason (R): Developed countries often have an older age structure. Choose the correct option:
A.A is true, R is false
B.A is false, R is true
C.Both A and R are true, and R is the correct explanation of A
D.Both A and R are true, but R is not the correct explanation of A
Explanation:
Consistency requires that all derived class frequencies (including ultimate classes) are non-negative, as negative counts are logically impossible in real-world data.
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