Table: water polo at the 2004 summer olympics - men 's team rosters
Question: What was the most common position played by the water polo players on the men's team rosters in the 2004 Summer Olympics?
Step 1 (Operation, Indexing): pos
Step 2 (Operation, Grouping): pos
Step 3 (Reasoning, Aggregating): COUNT, pos
Step 4 (Reasoning, Aggregating): MAX, pos
Answer: d