The gravitational force between two masses is considerable in which of the following situations?

The gravitational force between any two masses is given as:

${\text{F}}_{ }=\text{G}.\frac{{\text{m}}_{\text{1}}{\text{m}}_{\text{2}}}{{\text{r}}_{ }^2}$
Where m₁ and m₂ are the masses of the two bodies, r is the distance between them and G is the universal gravitation constant.
$G= 6.67 X {10}^{-11} N{m}^2/k{g}^2$

As we can see, the value of G is very small due to which the value of gravitational force will be small if objects are not massive.

Let's look at all the options:
Option A: Since the gravitational force is inversely proportional to distance and directly proportional to the product of masses, large distance and small masses will exert a very small force on each other. Hence the force will not be considerable.
Option B: It is not necessary that the masses should be present in a vacuum in order to exert a gravitational force on each other.
Option C: Since the gravitational force is directly proportional to the product of masses, having at least one massive body like the earth, moon or other planets will exert a considerable force on the other body.

Hence option C is the correct answer.