At, which temperature do `C_(3)` plants work best?

Explanation

**Step-by-Step Solution:**

1. **Understanding C3 Plants**: C3 plants are those that utilize the C3 carbon fixation pathway during photosynthesis. This pathway is typical for plants that thrive in cooler and wetter climates.

2. **Optimal Temperature Range**: Research and studies indicate that C3 plants perform best within a specific temperature range. This range is typically lower compared to C4 plants, which thrive in warmer conditions.

3. **Identifying the Best Temperature**: The optimal temperature range for the growth and photosynthesis of C3 plants is between 18 degrees Celsius to 24 degrees Celsius. Within this range, C3 plants can efficiently carry out photosynthesis and grow effectively.

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