Which invention was most important in revolutionizing the meat industry? a air brakes b knuckle couplers c the pullman car d the refrigerator car

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.