A person picks up a book from the floor and places it on a shelf. It drops to the floor, and then a second person raises it back onto the shelf. Which statement must be true?
- AThe second person does the same work on the book as the first person.
- BThe second person takes the same time as the first person.
- CThe second person develops the same power as the first person.
- DThe second person does the same work on the book as the first person, develops the same power and takes the same time.