Hillary is a cash-basis calendar-year taxpayer. During the last week of December she received a letter containing a $5,000 check for services. Which of the following is a true statement?A. Hillary is taxed on the $5,000 of service income in the year she cashes the check.B. Hillary is taxed on the $5,000 of service income in the year the check was mailed.C. Hillary is taxed on the $5,000 of service income in the year she receives the check.D. Hillary is taxed on the $5,000 of service income in the year she provides the services.E. None of these is true.