Which would be better to do for an empty house in the Winter

[ljk]

I have a rental property, 2-story home on a slab. The renters have just left for their vacation, won't be back till Jan 5th.

Thermostat is set at 64F.

Do I do
A.) shut the water at the meter, open a faucet.
B.) set a faucet at slow drip.

 

[dieselrealtor]

South Central Ind is going to warm up from what I can tell over the next 10 days. In the past, I have turned off my well pump, set tstat to 60 & not worried about it. If any faucets are on an outside wall I would open the cabinets