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By 2020, experts project that C. 80 percent of children at 30 years of age will still have living grandparents.

What is a projection?

A projection is an estimate or forecast of a future situation or reality based on a study of present trends.

For example, experts may project that a good number of children at 30 years of age will be enjoying the presence of their grandparents based on the improved living conditions that the world is currently witnessing.

Thus, by 2020, experts project that C. 80 percent of children at 30 years of age will still have living grandparents.

Learn more about projections at https://brainly.com/question/26045900