C. Charlie said that he would go to the cinema the next day.
Feedback When we repeat another person's words, we can use direct speech or reported speech. When we report another person's words some time after he/she said them, we usually use a past tense verb to introduce them, and we change the tense of the verbs as well. In general, the present form in direct speech changes to the past form in reported speech: e.g. the present form of the auxiliary verb 'will' turns into 'would'.The word 'tomorrow' changes to either 'the next day' or 'the following day'.