Respuesta :

Answer:

answer is given below

Explanation:

Social change refers to any significant change in behavior patterns and cultural values ​​and norms over time

so for 30 year in america they are as

  • Better Sanitation                
  • Very little to do with the medical innovation              
  • Better distribution of wealth through eight working hour in a day
  • GI Bill                            
  • Tax on the personal income                                      

these were the some change

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