Context: Paul is deciding whether to buy a copy of a book or borrow it from the library. He would like to be able to keep the book as long as he wants, but buying the book would cost money. He could borrow the book for free, but he would have to return it in a few weeks.
Suppose Paul decides to borrow the book from the library. Which result would be a cost?
A. Paul will give up the chance to keep the book as long as he wants.
B. Paul will save some money by not buying the book.
Pick the correct answer from the listed options and provide the letter of the selected option.

A