Even though I don’t have the choices , I’m going to say , to think freely .
The country that Japanese fought was China.
The word ''Sino" could be frequently spotted in Historic events around 90s, especially when the other countries were involved. Sino means Chinese, and whenever "sino-(country)" is found, it would means that China was involved.
Therefore the country is China.
Hope it helps!
D. none of these are examples of permissible limitations on the freedom of speech