(Help pls pls) during the early to mid-1800s which of the following contributed to the increased belief of manifest destiny A) The prospect of inexpensive land
B) The emergence of the republican party
C) Congress reducing Tarrifs
D) The expansion of slavery in the New England states

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.