Which of the following statements is false?
a.
in 1820 the majority of the united states congress was anti-slavery and the northern votes outnumbered representatives from the south five to one.
b.
after mexico’s cession of california and utah, the united states congress had to make compromises over slavery to keep the south appeased.
c.
the supreme court decision in the dred scott case increased tensions between the north and south.
d.
the dred scott decision stated that a slave owner from the south could move to a northern state where slavery was illegal and still keep slaves.

In 911, a group of vikings lead by rollo besieged paris and chartres. after a victory near chartres on 26 august, charles decided to negotiate with rollo. the talks were led by hervé, the archbishop of reims. this resulted in the treaty of saint-clair-sur-epte, which granted rollo and his soldiers all the land between the river epte and the sea. it also granted him brittany, "for his livelihood". at the time, brittany was an independent land which france had not been able to conquer. in exchange, rollo promised the king his loyalty and military assistance when needed. also rollo also agreed to be baptised and to marry gisela, the king's daughter. the territory given rollo is about the same as upper normandy. this would grow to become normandy under rollo's descendants. - wikepedia