All of the following types of research designs target the study of change over time except a: choose the correct answer from the following choices, and then select .
longitudinal study.
cross-sectional study.
cross-sequential study. survey

cross-sectional study.

Explanation:

A cross-sectional study consists of a research design that compares various individuals of different ages or levels of development at a specific point in time. For example, if you compare 4-year-old kids with 9-year-old kids. This kind of study is not appropriate to measure changes as time passes. In this case, a longitudinal study would be the right one to implement.  

no , per capita income is not a true measure of the development because: -it only tells us about average income not how income is distributed among the people.it only give us an idea of the economic aspect.it is only at the qualitative basis.moreover, income is not only the way of development other factors are also as much as important as income.

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