His old flask was strapped onto his belt , because he was worried that the contents would leak onto his clothes . But the hunt for a replacement receptacle was not why he was really out there . He was escaping the night , and the emptiness of his flat .

Generate a question about the above context.
Why did he leave his flat at night ?
(A). He was feeling alone . (B). He wanted to replace his flask . (C). None of the above choices . (D). He wanted to go exploring .