Suppose you run a pizza shop and currently have two employees. If you hire a third employee, your output of pizzas per day rises from 55 to 65. If you hire a fourth employee, output rises to 80 per day. A fifth and sixth employee would cause output to rise to 90 and 95 per day, respectively. Pick the correct statement: Select one:

a. Diminishing returns set in with the hiring of the fourth worker.
b. Diminishing returns set in with the hiring of the fifth worker.
c. Diminishing returns set in with the hiring of the sixth worker.
d. Diminishing returns set have not yet set in because output is still increases.

Apractitioner is engaged to prepare a client's federal income tax return for 2017 and 2018. the practitioner files the 2017 return on the client's behalf and provided copies of the 2017 return and all related documents to the client. after the 2018 return is prepared, the client disputes the fees for the 2018 tax engagement, terminates the relationship, and requests all tax returns and related records. the client has not yet paid for preparation of the 2018 return. under irs circular 230, which records must the practitioner return to the client? a.) notes the practitioner took when meeting with the client about the 2017 and 2018 tax returns. b.) the engagement letter executed by the client for preparation of the 2018 federal income tax return. c.) an appraisal the practitioner prepared in connection with the 2017 federal income tax return. d.) schedules the practitioner prepared, which the client needs to file in its 2018 federal income tax return.