C3. You can infer that this author
a. thinks society's attitude toward children is often hypocritical.
b. does not believe our children are "morally adrift."
C. is opposed to setting expectations for children.

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).

so is this a rhetorical question?

your answer would be: c