Final answer:
The observer would see a diminished and inverted image if she looked at the candle through the concave lens.
Step-by-step explanation:
The observer would see a diminished and inverted image if she looked at the candle through the concave lens. According to Table 25.3, concave lenses can only form virtual images. These virtual images are always upright and smaller than the object. Therefore, the correct answer is b) Diminished and inverted image.