A simple pendulum suspended from the ceiling of a stationary lift has period $T_0$. When the lift descends at steady speed, the period is $T_1$, and when it descends with constant downward acceleration, the period is $T_2$. Which one of the following is true?
  • A$T_0=T_1=T_2$
  • B$T_0=T_1$
  • C$T_0=T_1 > T_2$
  • D$T_0 < T_1 < T_2$
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