Britain and france declared war on germany in 1939 because hitler
a.
had allied with stalin.
c.
invaded france.
b.
broke promises made in munich.
d.
built auschwitz.

It should be because of the invasion of Poland. Hope i could help with this even though it is not one of the answers provided :)

The case was a u.s. supreme court decision that defined the scope of the u.s. congress's legislative power and how it relates to the powers of american state legislatures. the dispute in mcculloch involved the legality of the national bank and a tax that the state of maryland imposed on it.