"Lag", period.

As a swing "thought", I have to go with #2; Hands down.

eyes on the ball, mind in the hands - but specifically the flat left wrist is my guess

I went for Flat left Wrist but Hands was a very close 2nd.
Alex

Theres not too much time for thinking during the swing. :?

"sustain the lag." For me, the most difficult .

DRW

I vote for the MAGIC of the right forearm.

VOTE
 

I voted for #1 but my gut feeling was telling me the same as Hunter.
But . . . I never was good at guessing on tests!

Dave

I'm suprised that one of those would be used as you stand over the ball. You 'saw" the shot, can feel the target. From there it's mindfulness. Just get out of the way and let your body do it. :)

They are all excellent for practice, though. The swing thought of the flat wrist at impact seems to draw the others in line for me.

Charlie

"The Heart and soul of G.O.L.F. is developing a swing based on the hands."
Homer Kelley