The following text is from an article about space exploration.
Mars presents unique challenges for human exploration. The planet's thin atmosphere provides little protection from radiation. Dust storms can last for months, blocking solar panels. Additionally, the average temperature of -80°F requires extensive life support systems. Despite these obstacles, space agencies continue planning crewed missions.
What is the primary purpose of the text?
To argue that Mars exploration should be abandoned
To compare Mars to other planets in the solar system
To outline challenges facing Mars exploration
To describe a successful Mars mission
Correct Answer: C
Choice C is the best answer. The text lists specific challenges: thin atmosphere, dust storms, extreme cold, noting that missions continue despite these obstacles.
- Evidence: The text lists "unique challenges": "thin atmosphere," "Dust storms," "temperature of -80°F."
- Reasoning: The entire passage focuses on the difficulties of the environment.
- Conclusion: The purpose is to outline these challenges.
💡 Strategy: Identify the list of negative factors (challenges) presented.
Choice A is incorrect because continued planning shows exploration isn't abandoned. Choice B is incorrect because other planets aren't compared. Choice D is incorrect because no specific mission is described.