Answer: The correct answer is "D. A shareholder's S corporation stock basis will increase when the shareholder acts as guarantor on a corporate indebtedness.".
Explanation: The statement D. A shareholder's S corporation stock basis will increase when the shareholder acts as guarantor on a corporate indebtedness. is FALSE because a shareholder's S corporation stock basis does not increase when the shareholder acts as guarantor on a corporate indebtedness.