The correct response is:
The amount of the gravitational force doubles.
According to Newton's law of universal gravitation, the gravitational force \( F \) between two objects is given by the equation:
\[ F = G \frac{m_1 m_2}{r^2} \]
where:
- \( G \) is the gravitational constant,
- \( m_1 \) and \( m_2 \) are the masses of the two objects,
- \( r \) is the distance between the centers of the two masses.
If the mass of one object (say \( m_1 \)) doubles while the other mass (\( m_2 \)) and the distance (\( r \)) remain constant, the gravitational force \( F \) will also double.