Multiple choice answers seemingly mean the same thing.

Answer three is correct.
Answer two gives extra information which may not be correct.

I think Andrew is right on that.

May server [sic] all customers, except the designated driver, as much alcohol as they want
The ending clause to that option doesn't sound legally kosher even for bars where customers regularly get plastered drunk. I think on some technical basis the establishment has a legal responsibility to cut off the sale of alcohol to customers after said customers reached a certain point of consumption (that being at the discretion of the bartender or server to determine which would be difficult to codify as people hold their liquor consumption differently).

I agree.

In addition, the answers all say different things.

On the subject matter, as opposed to the individual meanings, I doubt the dram shop is required to be provided with a notice regarding who is the designated. Further, I doubt it has any legal requirement to withhold alcohol from the 'designated driver'. There may be a few states that address the situation, but not many, if at all.

Answer 2 means that you could serve the designated driver some alcohol.

Answer 3 means you could not serve him any alcohol at all.

In most bars in America the correct answer would be number 4.

That's true boom, but that would make it a trick question, since they were talking about designated drivers.

Wouldn't it?

1 inform the overseerer
2 inform the overseerer
3 or inform the devilseeker?
lol

I think it is a trick question.

Bartenders are typically not required to question the guests as to who is driving. Many bartenders never even come into contact with guests, the wait person does. The bartender/establishment can be held liable should a driver get into an accident though, so most places require their staff not to serve any visibly intoxicated person.

think u 4 answering my question..
..
...
..

Dionysius of Halicarnassus

You crack me up.

thank you, i try.

May not serve the designated driver alcohol. If the driver take alcohol then it comes under drunk and drive case. Once the driver complete his duty then after he can drink.