B. sounds like the most reasonable answer.
With an increase of people studying space exploration and sharing their discoveries, then it is likely for it to inspire other people in study science as well.
It is a covalent bond. Whenever a compound uses such suffixes like mono, di, tri, tetra, and so on, it is a covalent compound- thus having covalent bonds.
Universe, Stars, Planets, Asteroids
The answer is matter. This is explained in many books and theories.
Shirts without sleeves aren't allowed in a lab.