Why is age standardization necessary when comparing two populations' mortality rates? Group of answer choices Mortality rates are directly affected by a population's age distribution, so the "older" population is likely to have the higher crude death rate regardless of its underlying mortality risk Mortality rates are directly affected by a population's age distribution, so the "younger" population is likely to have the higher crude death rate regardless of its underlying mortality risk Most Western countries don't track deaths that occur after the age of 65 Infant mortality rates are often omitted from official data sources