Which French director, known for 'Jules et Jim' and 'The 400 Blows', had a cameo as the scientist in Spielberg's 'Close Encounters of the Third Kind'?

• A Jean-Luc Godard
• B Claude Chabrol
• C Francois Truffaut ✓
• D Eric Rohmer

Truffaut played Claude Lacombe, a French scientist, in Spielberg's 1977 film, one of his rare acting roles outside his own films.