Which statement is true? a. the rocky mountains extends from northern canada all the way through the united states. c. the mississippi river extends from northern canada all the way through the united states. b. canada and the united states share no landforms, rivers, or lakes. d. canada and the united states share no regional characteristics.

The Rocky Mountains extend from Northern Canada all the way through the United States (A) is a true statement. This is an enormous mountain range that spans two continents. Canada and the United States share many landforms, rivers, lakes, and regional characteristics. Additionally Canada and the United States share air and ocean space together which impacts their relationship in regards to trans-border pollution. 

answer: to communicate with people on the other side.

explanation:

but its not smart to do because the gateway on an ouija board is not gaurded