"excuse me..."
"bad things don't always make you a bad person"
"shall we talk inside?"
"i'm scared too..."
(Ignore radio)
and he went with me 💁

thanks for this, i tried just ignoring the radio both times and he still jumped and i was confused

I've picked the last 3 options from the Correct section (the name, the watch, ignore the radio); I may have also asked about the tent because I remember him saying that the tent wasn't his, and he was saved.
Quite curious: for all the remaining part of the game I've been thinking that he was a bad guy and I've been unsure that saving him was the right choice, and he'd go crazy and attack me or something similar, though his dialogues were normal. In the end it seems that I was paranoid.

Same here.

It matters. he jumped, even as i was ignoring the radio.

Could be possible, but if someone wants certainty then these choices will work 100%

I don't think it really matters what you choose dialogue wise, I think he jumps if you try your radio, and doesn't if you ignore it and talk to him. I asked if that was his tent and he still stepped down off the ledge.