B: 'laborers' were the most likely audience for this campaign poster.
A campaign poster is an exceptional means to expose the message to the target audience. Campaign poster offers a strong strategy with mesmerizing graphic designs to deliver the message to the targeted audience. As such is the case with the given campaign poster whereby laborers are most likely to be a target audience. The given campaign poster is an attempt to influence the decision-making progress across the various group of laborers.
You can learn more about poster campaign at
https://brainly.com/question/28474338
#SPJ4
