Which of the following statements is most correct?

a. A regular payment received by a person from a book publisher for royalties earned on sales of the persons first book will not be ordinary income.

b. A person can agree with their employer to give up part of their remuneration that they would otherwise receive in return for the employer providing them with non-cash benefits.

c. A lump sum payment received by a person from a book publisher for the sale of the copyright in their first book will always be assessable as ordinary income.

d. A lump sum received by a former employee in consideration of the former employee not competing with their former employer for a period of five years will be ordinary income.

e. A payment received by an employee where the payment reflects back-pay of wages for a prior period worked will not be assessable as ordinary income.