What is the yardstick that Sophie school is talking about?

b: the establishment clause  

b: socialism  

on this day in 1913, henry ford installs the first moving assembly line for the mass production of an entire automobile. his innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes.

that would be the steamboat because none of the other things are forms of transportation

answer; professor;