Why was the Mississippi critical to American expansion?

a.

It would allow for the development of America’s fishing industry along the Mississippi.

b.

It would carry tourists up and down the Mississippi, which would increase the economy.

c.

It was necessary to military operations occurring in the Great Lakes.

d.

It would provide access to markets located on the East Coast.

b. second continental congress

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the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.