PLEASE HELP! Read this excerpt from “The Unseen Values.”

The point, of course, is that any knowledge eventually pays dividends. The things we learn from our national space program will produce benefits in ways entirely unrelated to missiles or interplanetary travel.
Which words in the passage above best help the reader infer the meaning of dividends?

"national" and "interplanetary"
"knowledge" and "learn"
"pays" and "benefits"
"missiles" and "travel"