Which of the following was a major factor in the decision of the united states’ to enter world war i?
a. britain’s naval blockade of germany
b. germany’s unrestricted submarine warfare
c. vladimir lenin’s rise to power in russia
d. france’s fall to the central powers

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.

i know number 8 is something about only using 3/5 of the slave votes.