question: Which of the following is a motivating factor for using differential privacy in CPSs (cyber physical systems)? option 1: Differential privacy ensures privacy by perfectly preserving the original data option 2: Differential privacy provides a computational complex solution for privacy preservation option 3: Differential privacy can be applied to any type of data in CPSs option 4: Differential privacy provides a trade-off between accuracy and privacy in handling big data in CPSs 