During Which of the Following Phases of a Standing Vertical

Multiple Choice

During which of the following phases of a standing vertical jump is this statement true? 'The jumper's position is increasing, and both their velocity and acceleration are positive'.

A) Between the jumper's first movement and when they reach their peak downwards velocity during the countermovement.
B) Between when they reach their peak downwards velocity during the countermovement and when they reach the bottom of the countermovement.
C) Between the bottom of the countermovement and when they reach their peak upwards velocity before the instant of take off.
D) Between when they reach their peak upwards velocity and the instant of take off.