A company builds a wall-mounted clock that is a 1 : 9 scale replica of an old grandfather clock. All linear dimensions of the pendulum are reduced to one-ninth of the original. Neglecting air resistance, how does the period of the pendulum in the small clock compare with that of the full-size pendulum?
(a) one-ninth as large
(b) the same as the original
(c) one-third as large
(d) three times as large