What determines the maximum height of an object following a parabolic trajectory?

Both A and B. The maximum height of an object following a parabolic trajectory is determined by both its initial speed and the angle at which it is launched.The initial speed provides the object with the kinetic energy needed to reach a certain height. The faster the object is moving at the beginning, the higher it can potentially go.The angle of launch affects how much of that initial speed is directed upwards, against the force of gravity. A launch angle close to 90 degrees (straight up) will result in the greatest height for a given initial speed. However, if the angle is too shallow, much of the initial speed is directed horizontally, and the object will not reach as high of a maximum height.Therefore, to achieve the maximum height for a parabolic trajectory, both the initial speed and the angle of launch must be considered and optimized.