PLEASE READ THE PASSAGE BELOW In Unity Is Strength

An old man had three sons, but no peace of mind. There was never a moment of peace in his house, since his sons spent all day fighting each other. They fought over property, land, belongings and all such matter, but they never paid any heed to the protests of their father. The old man was troubled to a great extent, for he realized that as long as his sons fought each other, they would be prone to difficulties throughout their lives. He thought long and hard over what he ought to do to make his sons learn the importance of unity.
He called his sons to him one day and handed them each a stick, which he asked them to break. All the three sons snapped the sticks into two easily. The old man then handed each son a bundle of sticks tied together. He asked them to snap the bundle into two. All of them tried, but none could break the bundle. Angry and confused, they threw their bundles away and said, "How is it possible to break such a bundle in two? Individual sticks are easier, but bundles cannot be broken!"
The old man laughed and beckoned his sons closer. Then he said, "My sons, you have realized the truth and yet you fail to see its importance. When the sticks were alone, anyone could easily break them, but once they were all united, it was impossible to break them in any way. Similarly, as long as you fight with each other, anybody can harm you, for individually, you will be at your weakest. But when you are together, united, no one can cause you any harm."
The sons realized their mistake and they promised their father never to fight with each other again. Once again, peace was restored to their family.

How does the text structure in passage 2 contribute to the plot?
A.
The text structure shows the cause of concern the old man has toward his family and how this concern makes him teach his sons the value of being united.
B.
The text structure shows a description of the sons' lives from when they were young until old age and how the quarrels between them increase over the years.
C.
The text structure shows the problems that are faced by people when they quarrel with each other and how they become vulnerable to the evils of the society.
D.
The text structure shows a sequence of events in the passage that starts with how the quarrels started between the sons and how these quarrels increased.