For the given idiom, four sentences are provided below. Identify the sentence that demonstrates the correct contextual usage of the idiom. If no sentence is grammatically and contextually correct, select "None of these" as the correct alternative.

Bite the bullet

Correct Answer: Although she was terrified of dental procedures, she knew she had to bite the bullet and schedule the appointment.

Explanation:

The idiom "bite the bullet" means to face a difficult, painful, or unpleasant situation with courage and force oneself to get it over with, especially after delaying or fearing it.

Let's evaluate the options to see which sentence uses the idiom correctly:

1. "Due to the unexpected storm, our profits from agricultural exports have decided to bite the bullet." — Incorrect. Profits are non-living financial figures and cannot make a conscious decision to face a tough situation bravely.

2. "The children were playing music so loudly that their grandfather decided to bite the bullet in frustration." — Incorrect. Losing patience or acting out of frustration does not mean facing an unavoidable painful task bravely.

3. "Although she was terrified of dental procedures, she knew she had to bite the bullet and schedule the appointment." — Correct. Facing fear of a painful dental procedure and forcing oneself to make an appointment is the exact, appropriate contextual usage of "bite the bullet".

4. "The suspect decided to bite the bullet every time the detectives questioned him about the crime." — Incorrect. Remaining silent or refusing to talk does not align with the idiom's meaning of enduring an inescapable painful task.

Therefore, the sentence that correctly demonstrates the contextual usage of the idiom is: "Although she was terrified of dental procedures, she knew she had to bite the bullet and schedule the appointment."