Question: What is a data frame in R ? One dimensional object whose elements are all the same type. Two - dimensional object whose elements are

What is a data frame in R?
One dimensional object whose elements are all the same type.
Two-dimensional object whose elements are all of the same type
Two-dimensional object where the elements can be of any type (no structure required).
Two-dimensional object where each column is a vector (these vectors can be of differing types).
What is a data frame in R ? One dimensional

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