The first student has six choices of books; the second has five; and the third has four. By the Rule of product, there is a total of $$6\times5\times4=120$$ways. 
There are  different ways for a librarian, lending six different books to three students, given that each student gets only a book. 
Options:
(A) $$120$$ 
(B) $$100$$ 
(C) $$96$$ 
(D) $$72$$ 