Which type of irony occurs when there is a contrast between what the reader expects and what actually happens?

d seems accurate. maybe they wanted to see if anyone would actually like it. people seem to just like any simple thing on social media so it makes sense for an experiment to be conducted just to see if it would actually

sorry if its wrong i tried. i'm also sorry i'm awkward and bad at explaining

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).