Option A. Because Aaron couldn´t bear to bring Zlateh to the butcher, he spent the day walking around with her and the weather was getting worse and worse, so they had to find a shelter. They both hid in a haystack and could survive because they stuck together and because by eating the hay, Zlateh was able to produce milk and feed Aaron. This way, they could survive and Aaron´s family gave up on selling Zlateh to the butcher.
The correct option is B) “A snowstorm threatens their lives and forces them to seek shelter.” The reason why Slateh and Aaron spend days in the haystack is because a snowstorm took Aaron by surprise when he was taking the goat to the town. Even though Aaron did not agree with taking the goat to the butcher, he was obeying his father's orders.
Option C) is incorrect as it was not getting dark, it was the snowstorm that stopped him.
Option D) is also incorrect since Zlateh suspected that something wrong was happening but did not offer any resistance to move further.