If the length of a simple pendulum increases by a factor of $2,$ the period...

Pick the correct answer

Increases by a factor of $8$

Increases by a factor of $\sqrt[\phantom{2}]{2}$

Decreases by a factor of $\sqrt[\phantom{2}]{2}$

Decreases by a factor of $8$

Increases by a factor of $2$

Decreases by a factor of $2$

Increases by a factor of $4$

Decreases by a factor of $4$