The Batch Job processes the array of strings ['a', 'b', 'c'] and uses an upper function to convert each string to uppercase, resulting in ['A', 'B', 'C']. The Logger logs information after the Batch Job scope completes, and the most relevant information based on the options provided is the total records processed, successful records, and failed records. The processed payload is not explicitly logged in option D, hence it is the correct choice as it specifies the summary of processing: 'Total Records processed: 3', 'Successful records: 3', and 'Failed Records: 0'.