It's Possible That There May Never Be..........

[Bobbert]

Which of the following, if any, is the correct way to say:

While driving yesterday, I got to thinking that it's possible that there may never be a cure for the coronavirus.

Mientras manejando ayer, me puse a pensar que es posible que puede que nunca haya una cura para el coronavirus.

Mientras manejando ayer, me puse a pensar que es posible que pueda que nunca haya una cura para el coronavirus.

Mientras manejando ayer, me puse a pensar que es posible que nunca haya una cura para el coronavirus.

I was leaning toward the first choice as being the best translation, but now I'm not so sure. So as always, any input and/or explanation is appreciated.