A. Public domain means whose exclusive intellectual rights have expired , have been forfeited, have been expressly waived, or are incapable. So if someone owned a building but had their rights for the building terminated, that building is now a public domain until someone buys the building. So, after the building has been handed over because of the terminated rights of the owner, it is now a "Public Domain".
The answer is A. the atom is small and indivisible
A moral dilemma is a conflict in which you have to choose between two or more actions and have moral reasons for choosing each action.