Afriend spills a family size bag of chips into a bowl for both of you. which is the healthiest choice?

share the bowl
split it in half
select one serving
eat until you are satisfied

Explanation:

Select one serving is the healthiest choice here, because by taking only one serving you won't eat to much calories from the chips, and also you won't reject your friend's offering which isn't a good habit. Also, other options just adds more calories by eating a lot, like "eat until you are satisfied" or "split in half", that represents too much chips, which is not healthy.