- A5 °C
- B13 °C
- C−13 °C
- D−5 °C
Step-by-Step Solution
Undo the fall by going back up 9: (−4) + 9 = 5 °C. Check: 5 − 9 = −4. (−13 falls a second time instead of undoing.)
Answer: A) 5 °C
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