The future of space travel may not lie with humans, but with robots. At the dawn of the space age, space travel required human astronauts-they were simply more capable than robots. But humans developed technology that steadily made robots more attractive. Astronauts have to breathe, eat, and drink to keep going. But robots can travel to the ends of the solar system free of such constraints. They can do more, go further, and because they don't require costly life-support systems, they can do it all more often. Of course, they still require human direction. Nevertheless, we should all look for more robotic space travelers in the future.
Which of the following is a logical conclusion based on the passage?

Question

Quizplus · Accepted Answer

The author states that robots don't have to breathe, eat, and drink to keep going like human astronauts do, so they are a logical choice for space travel.
Robots and humans will travel the solar system together is incorrect. There is nothing in the passage that suggests that humans and robots will travel the solar system together. 
Humans must be careful not to make robots too intelligent is incorrect. The passage states that robots have become more attractive because of advances in technology. However, the author doesn't state or imply that humans should be careful not to make robots too intelligent. 
Humans can travel to the edge of the solar system using present technology is incorrect. The author does not state that humans can travel to the ends of the solar system, but he clearly implies that it is not the case.

The Future of Space Travel May Not Lie with Humans