To answer this question, we need to understand the structure of a KSDS (Key Sequenced Data Set) record.
A KSDS record is divided into fields, with each field having a fixed length. The key of a KSDS record identifies the record and is used for indexing and searching purposes.
In this case, the first field of the KSDS record is 25 bytes long and the key begins in the second field.
To specify the offset in the KEYS parameter, we need to count the number of bytes from the start of the record to the beginning of the key.
Since the first field is 25 bytes long and the key begins in the second field, the offset in the KEYS parameter is 24 bytes.
Therefore, the correct answer is option A) 24.