Answer & Explanation:
Correct Answer: B) The choice of measurement in the present determines the past behavior of the particle.
Explanation: Wheeler's Delayed-Choice experiment shows that the experimental apparatus decides whether the photon behaves as a wave or a particle after it has already passed through the split. This demonstrates that actions taken in the present retroactively influence how an event unfolded in the past, challenging classical notions of time, history, and causality.