The Carro has a reputation of being safe and fireproof. By "King's" do you mean king's gambit or king's indian? King's gambit is okay if you know what you're doing and well prepared. There is no refutation of it.
So too with the evan's gambit. If you are well prepared with the evans gambit you can beat a lot of players, including players of my level. Chess masters of the 1700s and 1800s used it. I think its playable.
If you are looking for something solid, learn the London system, the trompowsky, the torre as white. Even the colle is good. Plenty of free material online. These openings are danger-free with many good middle game ideas.
Can you tell me answer for the above question? Any opening is fine.