Answer:
B). met their ultimate demise at the hands of the Mongols.
Step-by-step explanation:
As per the question, the second statement most adequately states that the song connects to their eventual passing away at the Mongolian hands. In the context of its association with the adjoining authorities, it relates that how they ended up giving up to the Mongolian power and strength which not only marks the beginning of the Mongolian domination but also marked the end of their authority by displaying their fragility and deficiencies that led them to suffer this downfall. Thus, option B is the correct answer.