Compulsory voting is like requiring us to attend school or serve on a jury.
Auto loans and house loans tended to grow to more heights, and tended to be easier to obtain, it was the up and coming thing of the time. So, consumers thought, hey??? why not?
Though I do not know the choices you have to choose from, this is the one I have known for a while. If you want to comment back to my comment with the choices you were given, I will gladly help if this comment didn't provide an answer available to you.
I believe the answer is: A.Smith knew that the invisible hand of the market was not concerned with the health of the laborer.
The power of invisible hand in the market only care about the power of supply and demand which would determine who will obtain the most wealth. Even if the process could disregard the wellness of many people, as long as the demand is met, consumers wouldn't put too much thought on the laborers.
Im pretty sure each state had 1 vote :)