Final answer:
Without specific context or reference to the source material, it's not possible to accurately provide the correct answer to the actions taken by hockey players with Zach's underwear. The options provided are speculative without the proper context.
Step-by-step explanation:
The question seems to relate to a specific event in a book, story or an episode involving a character named Zach and his interactions with hockey players. Since there is no widely recognized historical occurrence or popular cultural reference that fits this scenario, it is not possible to accurately answer without more context or reference to the source material where this event is described. In a general sense, if this question pertains to a story, the actions that could be taken with Zach's underwear by hockey players would be based on the narrative that the author has created. Therefore, without the specific context or source material, any attempt at answering option a) 'Hid it,' b) 'Signed it,' c) 'Stole it' or d) 'Washed it' would be purely speculative.