Read this summary of information found in two seperate sources. The exploration of mars by humans is possible if safe and efficient technology is created for the journey and the time spent on Mars.

Which statements most likely provided the information for the summary? Select two options.

• Mars is the second-closest planet to Earth and can be observed in the night sky without special equipment.

• Astronauts will need to adapt to using advanced equipment and conducting complex operations farther and farther from Earth.

• Research aboard the international Space Station is leading to new discoveries about both Earth and the astronauts themselves.

• Since the end of the 19th century, Mars has been considered the planet most suitable and likely for exploration and even habitation.

• Novels by authors such as Ray Bradbury and Kim Stanley Robinson have led people to wonder if living on Mars is possible.