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