The correct option is B International Women's Day
The concept of International Women’s Day emerged in the early 1900s at a time of great unrest and debates among women against oppression and inequality. In 1908, 15,000 women marched through New York City demanding shorter hours, better pay and voting rights. Meanwhile in Russia, on the eve of World War I, women observed their first International Women’s Day on February 23. While it was February 23 on the Julian calendar used then in Russia, according to the Gregorian calendar, it was March 8. 60 years later, in 1977, United Nations proclaimed March 8 as the UN Day for women's rights and world peace.