Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 11 to 25

To determine the correct order of the sentences to create a logical text, let’s analyze the options:

1. The initial sentence states that the journey to the airport was proceeding smoothly until they encountered a problem.
2. Sentence (a) indicates that upon arrival, they were informed the check-in had closed.
3. Sentence (b) reveals they were stuck in a traffic jam for over an hour.
4. Sentence (c) mentions their attempt to contact the airline.

The logical sequence would be:
- Starting with the situation: **b** (getting stuck in traffic),
- Then arriving and finding the check-in closed: **a**,
- Finally, trying to resolve the situation by contacting the airline: **c**.

Thus, the correct order is: **b - a - c**.

Therefore, the answer is **C**.