I need help

Question 1 1 pts dv Let dt represent the rate at which the volume of a sphere is changing in cubic centimeters per minute (cm / min). dv f dt - -2 cm' /min at t = 3 minutes , then which of the following statements must be true? The volume of the sphere is always decreasing. The volume of the sphere is always increasing. The volume of the sphere is decreasing at t = 3 minutes. The volume of the sphere is increasing at minutes