Which explorer reached the southern tip of Africa ?

What clause(s) expanded the power of the executive branch, especially relating to foreign policy?

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.

Which roman emperor was responsible for a major shift in the dominate religious attitude of the roman empire?