It means that the area is as open as the land. If you think about it, land is pretty open. It basically means it's as big as the whole entire amount of land on Earth.
Answer:
C. The passage has a strong claim that is not backed up by sound reasoning
Explanation:
The passage made a very strong claim at the beginning of the sentence. The statement that young people are an important segment of society is a strong claim and the main argument that should have been backed up by strong reasoning.
The reasoning to back up the claim was out of line for it had no correlation with the main claim/argument of the author. Therefore, the strong claim was not backed up by strong reasoning.
Not totally sure if this is right but I think the answer is true