As a result of the shift in demand taking the price up to $12, A. The demand for labor increases.
When prices of a good or service rise, the producers will want to take advantage of that to make more profit by producing more of that good.
In this case, Jordan's Photography Studio will therefore hire more people to produce more posters which means that there will be a rise in demand for labor.
In conclusion, option A is correct.
Find out more on labor demand shifts at https://brainly.com/question/4389927.