[单选题]
If you take a given pendulum to the Moon, where te6rkyqt7g* xvi;ih; wa+x9e1 he acceleru0.pe+ b/p cffation of gravity is less than on Eart pe/+c.0fbfpu h, the resonant frequency of the pendulum will
A. increase.
B. decrease.
C. not change.
D. either increase or decrease; it depends on its length to mass ratio.
