```Questions 5 to 7 are based on Ferdinand Oyono's The Old Man and the Medal.```
'As he opened and shut his mouth his tower jaw went down and came up, puffing up and then deflating the • skin under his chin.' The subject of description in the lines above is

• A.the high commissioner
• B.M. Pipiniakis
• C.the white chief
• D.M. Fouconi