Context: Jill is deciding whether to buy a copy of a book or borrow it from the library. She would like to be able to keep the book as long as she wants, but buying the book would cost money. She could borrow the book for free, but she would have to return it in a few weeks.
Suppose Jill decides to buy a copy of the book. Which result would be a cost?
A. Jill will get to keep the book as long as she wants.
B. Jill will spend money to buy the book.
Select the correct answer from the given choices and respond with the letter of the chosen option.

B