Which quotation correctly uses ellipsis to shorten lincoln’s words?

The third one is the right one

The correct answer is A.

Explanation:

The best way to shorten Lincoln's famous words is to take out the apposition following the word "nation," since it is not as relevant as the other parts of the speech.

Answer B is wrong because it does not elide any part of the speech.

Answer C is not correct either because it eliminates the predicate of the sentence, making it incomplete.

And answer D is also incorrect because it takes out both the subject and the main verb, leaving another incomplete sentence.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).