C. demanded that the government institute democratic reforms.
Explanation:
The protests were kicked off among other things, by the death of a pro reform communist leader. The students were protesting for more democratic reforms for the economy as well as the government.
Right of free expression and freedom of the press along with the end of a single party rule were some of the agendas of the protest.
They were also protesting against rampant corruption in the Communist party which they believed would be curbed by more accountability.