The question asks which code blocks return all rows from the DataFrame. Let's analyze each option:

• A. storesDF.head(): Returns the first row (or first n rows if a number is provided). Without a parameter, it returns only the first row, not all.
• B. storesDF.collect(): Collects all rows from the DataFrame and returns them as an array (Array[Row]). This retrieves all data to the driver.
• C. storesDF.count(): Returns the total number of rows, not the rows themselves.
• D. storesDF.take(): Requires an integer parameter (e.g., take(n)). The code as written is invalid and will cause an error.
• E. storesDF.show(): Displays rows (default 20) in the console but returns void (no value). It does not return the rows as data.

Only B (collect()) returns all rows as part of its output. While show() prints rows, it does not return them, so E is incorrect. Thus, the correct answer is B.