Which statement (s) about galaxy groups is/are true? Choose one or more: A) Galaxy mergers in groups are not known to have ever happened B) Galaxies in a group are all moving away from each other. C) Interactions between massive and less-massive galaxies affect only the smaller galaxies. D) Tidal streams can result from galaxy interactions. E) The largest galaxies tend to have satellite galaxies.

All the provided options are correct

Explanation:

Galaxies are the broad and flat system of disc in which the solar system, planets, sun along with interstellar gas and dust particles are held by the force of gravitation.

Galaxies when occurs in multiple numbers, are considered to be galaxy groups and this galaxies can merge with one another and rapidly moving away due to the expansion of the universe since the big bang explosion.

When galaxies of equal mass collides then it forms elliptical galaxies, but when two galaxies of unequal mass collides with each other, then the bigger massive galaxies does not undergo changes in shape but the smaller galaxies gets significantly affected.

When galaxies collides with one another it forms a tail, due to the reaction between the interstellar gas and dust particles that are present in the space, and are known as the tidal tail and the galaxies that are huge and massive have numerous number of satellites.

Thus, all options are correct.