Correct Answer:
C. To stop working for the day
The idiom "Call it a day" means to decide to stop working on something for the rest of the day. It signifies the conclusion of work or an activity for that particular day.
- A: To start a new task is incorrect because the idiom implies stopping, not starting.
- B: To take a short break is incorrect as it refers to ending work for the day, not just a temporary pause.
- C: To stop working for the day is the correct meaning, indicating the completion of the day's work.
- D: To celebrate success is unrelated to the idiom's core meaning of concluding work.
Understanding idioms requires knowing their conventional, non-literal meanings.