Which of these contributed to the union victory in the civil war? (1 point)
a. a blockade of southern ports
b. alliances with france and britain
c. the outbreak of slave rebellions in the south
d. virginia's failure to secede from the union

B is false because neither the North or South forged any alliances. C is wrong as well because slaves feared rising against their masters and D is wrong as well because Virginia did secede from the Union.  So A is the only correct choice

Economic success prussia had a very strong economy, partly due to the success of the zollverein. stronger prussian army king wilhelm wanted to build a bigger, stronger army but was blocked by the prussian landtag (parliament).-credits to google for putting answer -credits to slideshare for making answer-credits to me for putting answer on brain.ly