Which of these would be a violation of the us constitution if it was written into a state constitution

In 1819, what did the united states obtain from spain for $5 million?

What did the u.s. want to build on the land acquired through the gadsden purchase?

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.