I want to know the answer to the following question:
Which person  was the most influential in beginning the movement with is three dimensional forms?
All the background I'm provided with is that "A retrospective of Cézanne's paintings had been held at the Salon d'Automne of 1904, current works were displayed at the 1905 and 1906 Salon d'Automne, followed by two commemorative retrospectives after his death in 1907.". Is that enough to answer the question?
Answer: no