11. When a mass m is hung on a certain ideal spring, the spring stretches a distance d. If the mass is then set oscillating on the spring, the period of oscillation is proportional to
(A) gd
(B) dg
(C) mgd
(D) dm2g
(E) gm
(A) gd
(B) dg
(C) mgd
(D) dm2g
(E) gm