Final answer:
The correct statement about two objects that have gravitational force is that they have mass.
Step-by-step explanation:
The correct statement about two objects that have gravitational force is option c) They have mass.
Gravitational force between two objects is directly proportional to the sum of the squares of their masses and inversely proportional to the distance between them.
For example, the Earth has a mass and therefore has a gravitational force that attracts objects towards its center.