Which sentence from "Elon Musk" best supports the inference that he thinks about the big picture? O Then, he designed his own video game.
O He wanted to affect the future of humanity.
O While he studied, he thought about which career he would pursue.
O As a student, Musk thought a great deal about these three areas.

He wanted to affect the future of humanity.

Explanation:

the words "strangest" and "unusual" suggest (:

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).