How do you differentiate between ‘may’ and ‘might’ in terms of permission?

A. ‘May’ is used for past permission, while ‘might’ is for future permission.

B. ‘May’ and ‘might’ are interchangeable in all contexts.

C. ‘May’ indicates a strong possibility, while ‘might’ indicates a weak possibility.

D. ‘May’ indicates permission, while ‘might’ suggests a possibility without clear permission.