Scenario: Wayne Enterprises, a company owned by Bruce Wayne, has a market value exceeding twenty-seven million dollars. After founding the Wayne Foundation, Bruce established Wayne Enterprises, where he serves as president and chairman. Bruce has sought your expertise, as his IT team is implementing Microsoft Azure Machine Learning for their data-driven projects. During a workgroup session, the team is discussing the Python syntax for defining a DataFrame in Spark using an existing Parquet file in DBFS (Databricks File System). Several syntax options have been proposed. Question: Which of the following Python syntax options is correct for defining a Spark DataFrame from a Parquet file in DBFS?