Option B is the correct option as in given lines its all about space mining "Space research, the event brought event company together, robotics experts, lunar scientists, and govt. agencies that are working to make space mining reality"
This paragraph clearly states all about space mining research. Following this paragraph, it is also mentioned further that two private asteroid mining firms to launch its first telescopes in two years, while others to hope to harvest metals from asteroids. Some are offering trips to the moon for meeting earthly demands of metals.
Hence all these support option B correct.