Review the passage.
Single trees, or small groups of trees in open pastures are exceedingly dangerous during a thunder storm; tall trees on the shores of a river or lake are particularly selected as targets for thunder bolts by the storm king. But the safest place in a thunder storm, next to a house, is a forest. The reason of this is that each wet tree is a lightning rod silently conducting the electric fluid without causing explosions.
Which best explains how to identify the text structure used in the passage?
A) The text structure is compare and contrast; the words but and without indicate this.
B) The text structure is problem and solution; the words safest and causing indicate this.
C) The text structure is sequence; the words exceedingly and particularly indicate this.
D) The text structure is cause and effect; the words the reason of this is indicates this.