Age of invertebrates was

Options

A. cambrian
B. silurian
C. ordovician
D. permian

Answer

To determine the age of invertebrates, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about the age of invertebrates, which refers to a specific geological period when invertebrates, particularly trilobites, thrived.

2. **Identify the Options**: The options provided are Cambrian, Solarian, Oedrovesian, and Permian. We need to analyze these periods to find out which one is associated with the peak of invertebrate diversity.

3. **Research Geological Periods**:
- **Cambrian Period**: Known for the "Cambrian Explosion," a time when many major groups of animals first appeared, including early invertebrates.
- **Solarian Period**: This period is less commonly referenced in the context of invertebrate evolution.
- **Oedrovesian Period**: This is a lesser-known geological period but is significant for trilobites.
- **Permian Period**: This period is known for the diversification of life but is more associated with the rise of vertebrates.

4. **Focus on Trilobites**: Trilobites are a key group of invertebrates that were particularly abundant during the Oedrovesian period. They are often used as indicators of the diversity and success of invertebrates during this time.

5. **Conclusion**: Based on the information about trilobites and their peak during the Oedrovesian period, we conclude that the age of invertebrates is best represented by the Oedrovesian period.

### Final Answer:
The age of invertebrates was Oedrovesian (Option C).

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