Question: You are cleaning a data frame with improperly formatted column names. In order to clean the data frame you want to use the clean _

You are cleaning a data frame with improperly formatted column names. In order to clean the data frame you want to use the clean_names() function. Which column names will be changed using the clean_names() with default parameters? Select all that apply.
1 point
column.1
column_3
column 2
column4

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