Answer:
Later Adulthood.
Explanation:
Later adult hood has the longest reign of age in years sitting at 22, the only other one that comes close is at 18 years for young adults, 15 for medium adults, 10 for adolescents, 8 for childhood, and 4 for infancy.
This means, even though your answer choices are setup in an unorganized fashion, that the answer would have to include all age ranges of young adults, medium adults, and later adult hood. If they include any about childhood, adolescents, or infancy, it is wrong because those 3 main groups, young adults, medium adults, and later adult hood are all larger in the range of ages.
Hope this helps!
