PYSPARK PRACTICEPySpark PracticeIntermediateQuestion 1 of 10%JoinsScenario practiceSelect one answerA join unexpectedly multiplies rows. What should you inspect first?AWhether the join keys are unique on the expected side(s)BWhether the DataFrame has a display nameCWhether the output column names are shortDWhether the job ran on a Tuesday PreviousSubmit answer