Its C. 66 cal , that's your answer to your question.
Answer:
The linear velocity of the object is 8.71 m/s.
Explanation:
Given;
mass of the object, m = 1 kg
radius of the circle, r = 3.3 meters
centripetal force, F = 23 N
Centripetal force is given by;

where;
v is the linear velocity of the object

Therefore, the linear velocity of the object is 8.71 m/s.
It would probably be D. because that would be a waste of the water, and it's not helping conserve it.
These are called neap tides!
Hope this helps :)