💡 Detailed Explanation
The man is expressing his gratitude and apology for all the help he received. The most natural response is to humbly express pleasure in being helpful. Response 1, 'Yes, thank you for your support as well,' is awkward because 'お世話になりました' is typically used at the end of a long-term project or relationship. Response 2, 'Yeah, because it was really tough,' sounds arrogant as if you are emphasizing your own effort.