Why did china invade vietnam in 1979? as punishment for vietnam's invasion of cambodia to install a communist government to take control of the communist movement there in order to invade cambodia?

Which of these statements accurately describes siddhartha gautama, the founder of buddhism?

What directive in source a might have been at the root of the action described in source b?

Following archduke franz ferdinand's assassination, austro-hungarian leaders: a. aided the ottoman empire in its campaign to keep serbia under its control. b. executed nearly all prominent serbs living in austria-hungary c. threatened to invade serbia if serb leaders did not agree to a set of strict demands. d.. formed an alliance with great britain to protect austria-hungary from future attacks.