Why would the personal trainer take a new member through an induction?

Taking an induction is your chance to learn about personal safety and to be instructed on how to use the cardiovascular and resistance equipment correctly in order to maximise your training effectiveness. Don't think about your gym induction as a tedious formality that you have to fulfil.

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).

i think the answer is either c or d

im thinking d might make more sense though

sorry if im wrong