Ancestral amphibians were tetrapods that evolved during `:`

Options

A. devonian
B. Carboniferous
C. Cretaceous
D. Jurassic

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the time period during which ancestral amphibians, which are tetrapods, evolved.

2. **Identifying the Options**: The options provided are Devonian, Carboniferous, Cretaceous, and Jurassic periods.

3. **Researching the Evolution of Tetrapods**:
- Tetrapods are vertebrates that have four limbs.
- The evolution of tetrapods began from lobe-finned fishes, which transitioned to land-dwelling organisms.

4. **Determining the Correct Period**:
- The evolution of tetrapods is known to have occurred during the Devonian period, which is approximately 400 million years ago.
- This period is often referred to as the "Age of Fishes," and it marks significant evolutionary advancements, including the emergence of the first tetrapods.

5. **Conclusion**: Therefore, the correct answer to the question is that ancestral amphibians, which are tetrapods, evolved during the **Devonian period**.

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