D. At the shop Tom ... 1) diản't buy anything. 2) bought some unnecessary things. bought only manuals. didn't find a wildemess guide. E. Everyone stared at Tom's backpack because…

D. At the shop Tom ...

1. didn't buy anything.
2. bought some unnecessary things. (Alternatively, "bought only manuals" could be a separate sentence: "He bought only manuals.")
3. didn't find a wilderness guide.

E. Everyone stared at Tom's backpack because ...

1. Tom had bought a cheaper one. (Note: If the intent was to imply that his backpack was different from others because it was cheaper, then this makes sense. Otherwise, consider clarifying the context.)
2. It looked new.
3. Tom didn't have any gadgets.
4. It looked old and used.

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