Context: Andrew 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 Andrew decides to buy a copy of the book. Which result would be a cost?
A. Andrew will spend money to buy the book.
B. Andrew will get to keep the book as long as he wants.
Pick the correct answer from the listed options and provide the letter of the selected option.

A