In 2023, Cindy made a $7,000 cash contribution to her church, a qualified U.S. charity. Years later, she is audited and the IRS requests documentation on the $7,000 contribution. Bank statements show the check was written and the amount was taken out of Cindy's account. Is this sufficient documentation? a. Yes, as long as the bank statement is from an independent 3rd party b. Yes, as long as Cindy at the time of the audit can contact her church and obtain a written acknowledgement of the receipt of the $7,000 check c. Yes, but only if Cindy also had secured an independent appraisal and it was attached to the original tax return d. No, Cindy needed to have written acknowledgement of the receipt of the $7,000 check by the church and she had to have that documentation when she filed the original tax return