D Question 9 2 pts What is the starting phase of a sine wave? O the point in the wave when it hits maximum positive displacement and "turns" toward the negative region O the point in the wave that it crosses the zero axis heading into the negative region O the point in the wave when it hits maximum negative displacement and "turns" toward the positive region the point in the wave when it hits maximum positive displacement and "turns" toward the negative region O the point in the cycle of the wave at which measurement/observation begins; it could be any of the other responses