You would use distance an time formula to mathmaticly solve
Answer:
A I think
Pls Mark Brainiest, I'm trying to become Virtuoso
Because you know that gravity is in m/s^2 so, period will be measured in seconds. You know the cable is 12m long and gravity is 9.81 solve for T (period) 2π12sqrt(9.81)=6.94922
It’s C I hope it helps you