Identical Balls Oscillate with the Same Period T on Earth

Identical balls oscillate with the same period T on Earth. Ball A is attached to an ideal spring and ball B swings back and forth to form a simple pendulum. These systems are now taken to the
Moon, where g = 1.6 m/s², and set into oscillation. Which of the following statements about these
Systems are true? (There could be more than one correct choice.)

A) Both systems will have the same period on the Moon as on Earth.
B) On the Moon, ball B will execute more vibrations each minute than ball A.
C) On the Moon, ball A will execute more vibrations each minute than ball B.
D) On the Moon, ball A will take longer to complete one cycle than ball B.
E) On the Moon, ball B will take longer to complete one cycle than ball A.

Correct Answer:

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