Question

one morning, toward the end of february, 1848, i sat quietly in my attic-chamber, working hard ... when suddenly a friend rushed breathlessly into the room, exclaiming: \what, you sitting here! do you not know what has happened?\
o; what?\the french have driven away louis philippe and proclaimed the republic.\-carl schurzin this passage, the author describes a feeling of excitement among students in germany. which event causes that feeling?○ the defeat of the french army at waterloo○ the end of the congress of vienna○ the french revolution of 1848○ the election of napoleon iii in 1848

Explanation:

The passage is dated February 1848, and the friend announces the French have overthrown Louis Philippe and proclaimed a republic, which refers to the French Revolution of 1848. The other events do not match the date or context: Waterloo was 1815, the Congress of Vienna ended in 1815, and Napoleon III's election was in 1848 but after this February event.

Answer:

the French Revolution of 1848