Read the sentence from paragraph 3 of Robots: The New Space Explorers.
We are so far away from other planets that current technology makes it impractical for humans to travel to them.
How does this sentence contribute to the paragraph?
A.
It shows that humans are the best option for space exploration.
B.
It emphasizes the cost-effectiveness of sending robots to space by discussing technology.
C.
It shows that space exploration is dangerous.
D.
It emphasizes the need for using robots for space exploration by discussing distance.