3. Which of the following is the most accurate statement about the article "Survival in the
Desert" and its intended purpose?

I'd sat choice A most explicitly "makes us think more deeply about a topic." In fact, Rosen incites us (the readers) explicitly, writing: "we must consider what..." thus making us "think." 
With this, however, one may argue that choice D incites us implicitly, saying: "the oracles advice might be show thyself." By using the phrase "might be", Rosen establishes an unsure position, one which could, if further discussion warranted it, potentially change. 
If you need further clarification, ask for it!