The detail from "The Mystery of the Missing Hamburger" that best explains why Juan is in a hurry after his client calls is:
"In my experience, the more time passes, the harder it is to solve a mystery."
- "The Mystery of the Missing Hamburger" is a short story whose main character is Juan. He is a boy who solves mysteries.
- One morning, a neighbor calls and tells Juan she needs his help. It is still early, and Juan hasn't had breakfast yet.
- He knows he should eat something before leaving, but he is in a hurry because, according to him "the more time passes, the harder it is to solve a mystery."
- In other words, Juan is in a hurry because he knows time is an essential element to get a mystery solved.
- In conclusion, the detail from the story that best explains why Juan is in a hurry is "In my experience, the more time passes, the harder it is to solve a mystery."
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