Here’s what happen…

Theyd kill and destroy a few things and then would get contained by the authorities

Tyrannosaurus,here is all the reasons why

1. It is the largest Apex carnivore to have ever lived on land

2. It has the strongest bite force of any animal

3. It is very robust and even if it was brought back to life,it would have to be in Africa instead of the USA since it would hunt everything in its sight,plus it would have to be with a few animals that can rival it

A large Sauropod

None, because no dinosaur can be a significant threat on humanity.

The question asked what would be the worst, not what would be bad for humanity

Dinosaurs won't pose a threat but one of them has to be more of a nuisance than the rest, even if it isn't that much

Is de-extinction correct?

Okay, then I choose Deinonychus because it’s the closest thing to a Canada goose.

From this list maybe Carnotaurus I guess. It's the size to be able to go for livestock and potentially humans while still being large enough to outcompete most other predators. But a herbivore like a sauropod or hadrosaur would cause more damage imo

I don’t think that it would be bad for us if any of them came back. It would be bad for them

Fr