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Question:

Which of the following conclusions can be made with certainty about the chart?

A There is no data indicated on the chart to show if 1960 held an increase or decrease in recycling for any of the materials.
Explaination

Since we do not have data about what happened before 1960, we cannot tell if recycling increased or decreased in 1960. This eliminates the other choices and makes answer "There is no data indicated on the chart to show if 1960 held an increase or decrease in recycling for any of the materials" the correct answer.