How to avoid overtightening flexible water supply hose connectors
Option 2, with caveat...

These water supply hoses undergo cycles of temperature change and are subjected to vibration due to flow. For me to be confident that the connections won't loosen and leak over time, I always give them a "snug-up" with a wrench. I don't strictly adhere to either a 1/4 turn or 1/2 turn... I hand tighten then give just a bit of a snug, by feel. They will leak if over-tightened.