B could be the only answer because its a personal pronoun
So here,
Sam, Sally and John are on the boat and are sailing to find a island.Suddenly the motor stops working. They all were worried. Sally started crying because the boat was not moving. After that they see a mountain. And decides to Swim till there.
Noun, like a person place or thing.
So, in the 1st one you would list 'Radio, Inventors, and Television'
Hope I helped :)
Have a nice Day!