Two Books Are Tied Together with a Length of String

Multiple Choice

Two books are tied together with a length of string. With the string taut, one book is pushed off the edge of a table. As it falls, the other book is dragged horizontally across the table surface. With no friction, acceleration of the books is

A) zero.
B) g/2.
C) g)
D) a value between zero and g.
E) a value that could be greater than g.