The correct answer is E. Here's the analysis:

• Option A: Using col("sqft") to index a Row is invalid. Rows require column names as strings, not Column objects.
• Option B: DataFrame does not support [0] index-based access.
• Option C: collect(l) contains a typo (likely collect()[0]), but even if corrected, collect() retrieves all rows, which is inefficient for extracting a single row.
• Option D: first is a method and requires parentheses (first()) to invoke. Missing parentheses makes this syntax incorrect.
• Option E: Correctly uses first() to get the first Row and accesses the sqft column via dot notation, which is valid in PySpark for Row objects.