Answer:
c. a decrease in the wage rate of accountants
Step-by-step explanation:
As a result of the revision that makes personal tax returns much easier to complete, people would no longer need the services of accountants to calculate their tax returns. As a result, the demand for accountants would fall, all other things remaining equal.
The fall in demand would lead to a fall in wage rate of accountants
Please check the attached image for a graph explaining this concept