Which of the following code blocks returns a DataFrame with a column named `dayOfYear` that contains the integer day-of-year value derived from the `openDate` column in DataFrame `storesDF`? Note: The `openDate` column is of integer type and stores UNIX epoch timestamps (seconds since midnight on January 1, 1970). A sample of `storesDF` is shown below: ``` storeId openDate 0 1100746394 1 1474410343 2 1116610009 3 1180035265 4 1408024997 ``` | Databricks Certified Associate Developer for Apache Spark Quiz - LeetQuiz