Which statement best explains how Newton's law of universal gravitation shows that gravity is universal in nature?

• A. Gravity only acts between objects located on Earth, and it is negligible elsewhere in the universe.
• B. The gravitational force between two masses is proportional to the distance between them: $F\propto r$.
• C. Every pair of masses in the universe attracts each other with a force proportional to $m1$ and $m2$ and inversely proportional to the square of the distance between them: $F=G\frac{m1m2}{r^2}$.
• D. Gravitational attraction depends on an object's electric charge rather than its mass.

Answer: (C)