Which of these was most closely related to the theme of science and technology?

What is the most necessary information that happened in the titanic movie

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.

Why did roosevelt support a europe first strategy even though it had been japan that had first attacked the us