$1)$ When the mass of a simple pendulum is tripled, the time required for one complete vibration $11)$

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A$)$ does not change.

B$)$ decreases to $3/4$ of its original value.

C$)$ increases by a factor of $3.$

D$)$ decreases to one$-$third of its original value.

E$)$ increases to $4/3$ of its original value