Final answer:
Corporate shareholders are indeed entitled to a dividend received deduction to help offset the 'double taxation' on dividends they receive, which is true.
Step-by-step explanation:
The statement that corporate shareholders are entitled to a dividend received deduction to offset additional layers of taxation is true. This is because when a corporation earns profits, it pays taxes on those profits at the corporate level. If these profits are then distributed to shareholders in the form of dividends, the shareholders would also be required to pay taxes on the same profits at the individual level. This phenomenon, known as 'double taxation', is mitigated by the dividend received deduction, which allows corporate shareholders to reduce the amount of dividends that are subject to taxation, thereby preventing the profits from being taxed excessively.