The correct answer is: "Business owners would be less likely to invest in their businesses if they could not personally profit from them".
Investments consist on directing a certain amount of money to the purchase of an asset or a right, expecting to receive that money back together with a retribution. For example, business owners bring money to a corporation by buying stock, expecting to either receive dividend payments or to resell that ownership title for a higher price that the price paid for it.
In conclusion, economic agents (such as business owners) are only willing to invest in exchange for a retribution. If they do not offer so to potential investors, it would be very difficult for corporations to pool the enough amount of funds to undertake their economic activity.