[单选题]
What happens to a simple pendulum's frequency if both (he7uo 3 d,pmbit /h7; hk4zorqc;5psg.v vcj( s7qzd8hs length and mass are inczqovk4/77 h;s.8;s gphzdc5vq jr h( creased?
A. It increases.
B. It decreases.
C. It remains constant.
D. It could remain constant, increase, or decrease; it depends on the length to mass ratio.
