Answer:
B) The popularity of imported American films
Step-by-step explanation:
The expansion of the French Film industry in the middle of 1900s was caused by various factors, some of which are the following:
1. The development and growth of the largest motion picture firms
2. Film industry market was driven towards the wealthy audiences
3. There is more time for leisure for French citizens
Hence, in this case, the correct answer is option B, The popularity of imported American films, which is not a significant factor for the expansion of the French Film industry in the middle 1900s