The correct answer is A. 2.44 times more.
The frequency of oscillation is the number of times an object moves back and forth in a given amount of time. The frequency of oscillation is inversely proportional to the square root of the acceleration due to gravity. This means that the frequency of oscillation is higher on the moon than on Earth because the acceleration due to gravity is lower on the moon.
The acceleration due to gravity on the moon is 1.62 m/s^2, while the acceleration due to gravity on Earth is 9.8 m/s^2. This means that the frequency of oscillation on the moon is 2.44 times more than the frequency of oscillation on Earth.
Option B is incorrect because the frequency of oscillation is higher on the moon than on Earth. Option C is incorrect because the frequency of oscillation is 2.44 times more, not 3 times more. Option D is incorrect because the frequency of oscillation is higher on the moon than on Earth.