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Which of the following code blocks correctly converts the openDate column (stored as integer UNIX timestamps representing seconds since 1970-01-01) into a string column openDateString formatted using Java's SimpleDateFormat (e.g., "Sunday, Dec 4, 2008 1:05 pm")?
Given the following sample data from storesDF:
storeId openDate
0 1100746394
1 1474410343
2 1116610009
3 1180035265
4 1408024997