After each of the following sentences, a list of possible interpretations of the sentence is given. Choose the interpretation that you consider most appropriate for each sentence.
When the managing director promised to increase the wages of the workers in the new year, everybody knew that he was talking with his tongue in his cheek. This means that the managing director

• A.was very sincere
• B.spoke courageously
• C.was not sincere at all
• D.hid his tongue while speaking