If the temperature at sunset was negative ten degrees Fahrenheit (-10°F) and it decreases by 12 degrees, you can calculate the lowest temperature overnight by subtracting 12 from -10:
\[ -10°F - 12°F = -22°F \]
However, -22°F is not one of the given answer options. Let’s check the possible responses:
- Negative ten Fahrenheit
- Ten Fahrenheit
- Fourteen Fahrenheit
- Negative fourteen Fahrenheit
Since there seems to be an implied problem with the answer options provided, the closest answer to the calculated lowest temperature of -22°F would be Negative fourteen Fahrenheit (-14°F), but it doesn't align directly with the calculation provided.
Based on the details given, the transition from -10°F to the lowest temperature would definitively result in -22°F, but since that isn't listed, the correct option among those provided would be -14°F.