Answer & Explanation:
The correct answer is: both are stronger than the electromagnetic force.
Gravitational force is the force of attraction between any two objects with mass. It is the weakest of the four fundamental forces of nature (gravity, electromagnetism, strong force, weak force), and it is always attractive.
The strong force, also known as the strong nuclear force, is one of the four fundamental forces of nature and is responsible for holding together the nucleus of an atom. The strong force is much stronger than the electromagnetic force, but it has a very short range and is only effective over distances of about 10^-15 meters. The strong force is also both attractive and repulsive, depending on the distance between the particles involved.
Therefore, the only answer choice that accurately describes both forces is that they are stronger than the electromagnetic force.