Read the following paragraph and answer the question that follows:
If we can send a human to the Moon, why can’t we build sustainable cities? Defeat cancer? Tackle climate change? So, go the rallying cries inspired by one of humanity’s greatest achievements, the US effort that put Neil Armstrong and Buzz Aldrin on the Moon on 20 July 1969.

Which of the following statements, if true, BEST communicates the intent of the paragraph?

The passage clearly states that, despite sending a man to the moon, we have yet to find a solution for cancer or develop sustainable cities. Hence, we can infer the intention to state that lateral issues are more complex than the former ones. Therefore, the correct answer is E.
The tone implies: "If we could do something as hard as landing on the Moon, why haven't we solved these other problems?"

Why E is correct:
The paragraph's underlying intent is that problems like sustainable cities and cancer are being compared to the Moonshot—and the implication is that these modern challenges are even more complex and harder to solve than putting a man on the Moon. That's why they remain unsolved despite the moonshot being achievable.