A home aquarium partly filled with water slides down an inclined plane of inclination angle $$\theta$$ with respect to the horizontal. The surface of water in the aquarium

A

remains horizontal.

B

remains parallel to the plane of the incline.

C

forms an angle $$\alpha$$ with the horizon where $$0 < \alpha < \theta$$

D

forms an angle $$\alpha$$ with horizon, where $$\theta < \alpha < 90$$