Final answer:
Ashley can determine that the clock is to the right of her by noticing that the candles were on her left during the thunderstorm.
Step-by-step explanation:
Ashley is able to determine that the grandfather clock is to the right of her because she remembers seeing candles and matches next to the clock during the thunderstorm. When the electricity went out, she could only see what was illuminated by the candles. Since she saw the candles to her left, she can infer that the clock must be to her right.