Answer:
Your answer should be C) To force China to grant Japan trade concessions.
Step-by-step explanation:
The Twenty-One Demands was a set of demands made during the First World War by the Empire of Japan under Prime Minister Ōkuma Shigenobu to the government of the Republic of China on 18 January 1915. The secret demands would greatly extend Japanese control of China. Hope this helped and good luck :)