HELP The US was most worried about missile sites in Cuba because they feared

such weapons would disrupt travel in the Caribbean.
the USSR could easily launch nuclear weapons against the US.
such an arsenal would make it easier for spies to infiltrate the US.
trade between the two countries would be affected.

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.

What role did the alliance system play in preventing austria-hungary and serbia from coming to a compromise settlement?

The eastern roman empire is also known as what empire