And as for the decks and upper works they would caulk them as well as they could, though with the working of the ship they would not long keep staunch, there would otherwise be no great danger, if they did not overpress her* with sails —from Of Plymouth Plantation by William Bradford *her—the ship

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).

the answer to this question

where are the options? i can try to if you add them : )