Which facts can be cross-referenced using these two sources? Check all that apply. The dictionary was published in 1755.
The dictionary contains grammatical rules.
The dictionary was a definitive source until 1828.
The dictionary has two volumes.
The dictionary contains a history of the language.

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).

last one is the answer

would cloning of animals be allowed to prevent extinction?