All of the following are indicators of low social welfare except
a. high infectious disease rates
b. inadequate sewer systems
c. high literacy rates
d. large numbers of child laborers

the one that is not an indicator of low social welfare is: C. high literacy rates.  High literacy rates will be connected to a good quality of Education system. In order to have a good education system you need social welfare, which explain why high literacy couldn't be considered as an indicator of low social welfare.

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Idont understand the question