Answer:
getting the astronauts back to Earth would be very difficult.
Explanation:
The correct answer is option A: getting the astronauts back to Earth would be very difficult.
The passage's tone, as indicated by phrases such as "scrambled," "worked around the clock," "figure out new scenarios," and "didn't have that kind of time," conveys a sense of urgency and difficulty. It emphasizes the challenging situation faced by the NASA teams and suggests that finding a solution to bring the astronauts back safely would be a difficult task.