Question: What is the key difference between concatenating and merging SAS datasets? Concatenation creates a new dataset, while merging modifies an existing one Concatenation combines observations

What is the key difference between concatenating and merging SAS datasets?
Concatenation creates a new dataset, while merging modifies an existing one
Concatenation combines observations vertically, while merging combines horizontally
Both a) and b) are correct
There is no significant difference

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