Select the three statements that are true about the panama canal. reduced travel time increased trade between the united states and central and south america improved america's defense improved american relations with colombia encouraged u. s. trade with europe

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.