Dinosaurs were dominant during

Options

A. Devonian
B. Plesocence
C. Permain
D. Jurassic

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks during which period dinosaurs were dominant. We need to identify the correct geological time frame from the given options.

2. **Identifying the Options**: The options provided are:
- A) Devonian
- B) Pleistocene
- C) Permian
- D) Jurassic

3. **Reviewing Geological Time Periods**: Dinosaurs are known to have existed during the Mesozoic Era. This era is crucial for understanding the dominance of dinosaurs.

4. **Mesozoic Era Breakdown**: The Mesozoic Era is divided into three periods:
- Triassic
- Jurassic
- Cretaceous

5. **Determining Dominance**: Dinosaurs were particularly dominant during the Jurassic period, which is the second period of the Mesozoic Era.

6. **Eliminating Incorrect Options**:
- Devonian: This period is before the Mesozoic Era, so it cannot be correct.
- Pleistocene: This is a much later period, after the dinosaurs had already become extinct.
- Permian: This period is also before the Mesozoic Era.
- Jurassic: This is the correct answer as it falls within the Mesozoic Era when dinosaurs were dominant.

7. **Final Answer**: The correct answer is D) Jurassic.

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