| A) | The percentages of people at different ages in the life span are similar
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| B) | Emphasized each person's uniqueness and the finiteness of life
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| C) | Found that the ability to solve practical problems increased for adults throughout their 40s and 50s
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| D) | Is conducting an extensive study of intellectual abilities in the adult years
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| E) | Middle adulthood is full of changes, twists, and turns; the path is not fixed
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| F) | Believed that commitment to, and balance of, work, family, and leisure shifts as we age
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| G) | Religion can serve as a meaning system through which bereaved individuals are able to reframe their loss and even find avenues of personal growth
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| H) | Believes some abilities decline in middle age, whereas others increase
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| I) | Argues that the quest for a meaningful life can be understood in terms of four main needs for meaning
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| J) | Argues that starting in late middle age, more time is needed to learn new information
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