What was true of the demonstrators?

(28[C])Some 150 South Korea female college students burned a Japanese flag yesterday in a noisy demonstration outside the Japanese embassy, (29[A])demanding full compensation for World War Ⅱ victims. Platoons of (30[D])South Korea riot police armed with shields and clubs immediately surrounded the demonstrators and formed a human barricade to prevent possible violence. The demonstrators torched a huge Japanese flag scribbled with slogans, demanding that Japanese Prime Minister raise a government fund for Korea war victims. South Koreans have staged weekly protest outside the Japanese Embassy for more than two years, demanding Japan fully compensate World War Ⅱ victims, including "comfort" women forced into sexual slavery for Japanese imperial soldiers.