C. Why did the fox stop?

Решение:

В тексте сказано: "As the race went on, the fox saw beautiful flowers in the forest. It was difficult to believe the fox saw beautiful flowers, but it was true. The fox stopped to look at them." Это означает, что лиса остановилась, потому что увидела красивые цветы в лесу.

Вариант 1) there were some flowers in the forest..