Which of the following statements can be used to add two

Which of the following statements can be used to add two months to the existing date?

1. $date = modify(‘+2 months’);
2. $date->modify(‘2+ months’);
3. $date->modify(‘+2 months’);
4. $date = modify(‘2+ months’);
5. None of these

To change the date stored by a DateTime object after it has been created, you use DateTime::modify() with a natural language expression.