Which of the following code blocks correctly splits the `storeCategory` column from DataFrame `storesDF` at the underscore character, creating two new columns named `storeValueCategory` and `storeSizeCategory`? A sample of DataFrame `storesDF` is shown below: ``` storeId open openDate storeCategory 0 true 1100746394 VALUE_MEDIUM 1 true 944572255 MAINSTREAM_SMALL 2 false 925495628 PREMIUM_LARGE 3 true 1397353092 VALUE_MEDIUM 4 true 986505057 VALUE_LARGE 5 true 955988614 PREMIUM_LARGE ``` | Databricks Certified Associate Developer for Apache Spark Quiz - LeetQuiz