According to the 2010 census, those states with an above-average number of people who fail to complete high school ( X ) tend to have an above-average number of infant deaths ( Y ). In other words, there is a positive association between X and Y . The most plausible explanation for this association is that:

The answer is "Option a"

Explanation:

The missing option is added in the attached file, please find it.

There have been languishing factors, in which  Cities with high populations, for example, If it will also have many more persons were not always completing elementary school and much more infant casualties, and the wrong choice can be defined as follows:

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