Both of the construction projects required a lot of manpower, so many unemployed men were hired.
To my knowledge, the correct answer among all of the given choices is C.) Steam. If I'm not mistaken, this was the time that more trains came into use.
I hope this is the answer you were looking for and that it helps!! :)
1)Put healthy snacks in the vending machine (less unhealthy snacks)
2) Remove vending machines ( remove the option of unhealthy snacks)
