What is the difference between ‘will’ and ‘going to’ in expressing future intentions?

A. ‘Will’ indicates certainty; ‘going to’ indicates uncertainty.

B. ‘Will’ is used for future facts; ‘going to’ is for predictions.

C. ‘Will’ is for spontaneous decisions; ‘going to’ is for planned intentions.

D. ‘Will’ is for past intentions; ‘going to’ is for present intentions.