Answer:
e. none of the above
Step-by-step explanation:
The frequency of an oscillating pendulum is the number of oscillation per unit time.
Mathematically, the frequency of an oscillating pendulum is given by the formula;
F = 1/2π√(k/m)
Where;
F is the frequency of oscillation.
k is the spring constant.
m is the mass of the spring.
Hence, none of the changes mentioned will increase the frequency of an oscillating pendulum.