Franco-German War, also called Franco-Prussian War, (July 19, 1870–May 10, 1871), war in which a coalition of German states led by Prussia defeated France. The war marked the end of French hegemony in continental Europe and resulted in the creation of a unified Germany.
The three religions that dominate the most densely populated areas in Asia are Islam, Christianity and Buddhism.The most densely populated area in Asia is its South Asian region, which includes countries like India, Pakistan, Bangladesh and Afghanistan. The people of these countries mostly observe these three religions, while India has predominantly Muslims and Hindus.
The most likely reason for women to become heads of state is the general progress in gender equality, which slowly introduced women to position of moderate power (parliament), which prepared ground for their position as a head of state.
A. 1967/1968
The other answers weren't even during the time of the Vietnam Conflict, whereas Option A even coincides with protests close to Kent State in 1970.