Read the following excerpt carefully and answer the questions that follow:
Draupadi's Marriage
Drupada, the king of Panchala, organised a competition where the challenge was to string a bow and hit a target, the winner would be chosen to marry his daughter Draupadi. Arjuna was victorious and was garlanded by Draupadi. The Pandavas returned with her to their mother Kunri, who, even before she saw them, asked them to share whatever they had got. She realised her mistake when she saw Draupadi, but hrergommand could not be violated. After much deliberation, Yudhisthira decided that Draupadi would be their common wife. When Drupada was told about this, he protested. However, the seer Vyasa arrived and told him that the Pandavas were in reality incarnations of Indra, whose wife had been reborn as Draupadi, and they were thus destined for each other. Vyasa added that in another instance a young woman had prayed to Shiva for a husband, and in her enthusiasm, had prayed five times instead of once. This woman was now reborn as Draupadi and Shiva had fulfilled her prayers. Convinced by these stories, Drupada consented to the marriage.
How does this story reveal that mother was considered as the highest guru ?

Explanation

After Arjuna won the archery contest, Draupadi garlanded him. The Pandavas returncd with her to their mother who asked them to share whatever they had brought without looking at them. They accepted her command becausc they regarded her as their greatest guru.