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skad [1K]
3 years ago
7

Increases in life expectancy in the United States during the twentieth century were due primarily to

Social Studies
2 answers:
maw [93]3 years ago
5 0

Answer:

the correct answer is d

Juliette [100K]3 years ago
4 0

Answer:A. the control of childhood and infectious diseases.

Explanation: Life expectancy began to rise due to better sanitation and education in the twentieth century

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Cross-sectional studies capture a single point in time, gathering data from a research group at a particular point. This is often done with a single survey, questionnaire, or observation.

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2 years ago
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Mekhanik [1.2K]

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behavioral

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In the roman soldier model for refraction, what happens to the first soldier who hits the muddy stream?
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