## Core Concept
The question revolves around food poisoning, which is an illness caused by consuming contaminated food. The key to solving this question lies in understanding the typical incubation periods of various foodborne pathogens.

## Why the Correct Answer is Right
The symptoms developed 1 hour after eating, indicating a short incubation period. **Staphylococcus aureus** is a common cause of food poisoning with a short incubation period, typically within 1-6 hours. This pathogen produces heat-stable enterotoxins that can cause vomiting and diarrhea shortly after ingestion of contaminated food.

## Why Each Wrong Option is Incorrect
* **Option A:** If the pathogen had a longer incubation period, such as *Salmonella* or *E. coli*, symptoms would likely appear after several hours or even days, not within 1 hour.
* **Option B:** *Clostridium perfringens* causes food poisoning with an incubation period of 8-22 hours, which does not match the timeline provided.
* **Option D:** *Bacillus cereus* can cause food poisoning with a short incubation period similar to *Staphylococcus aureus*, but given the specifics of the scenario and common causes, it is less likely to be the correct answer compared to *Staphylococcus aureus*.

## Clinical Pearl / High-Yield Fact
A key point to remember is that food poisoning due to *Staphylococcus aureus* typically presents with a short incubation period and symptoms like vomiting and diarrhea. This is often associated with improperly handled food, particularly in settings like restaurants.

## Correct Answer: C. Staphylococcus aureus