Answer:
maintain ownership control, by holding the class of stock with greater voting rights.
Explanation:
Stocks can be divided into two main categories, common stocks and preferred stocks. Preferred stocks grant no voting rights. But common stocks can also be classified in different classes, e.g. class A or class B common stocks. Generally class A stocks have higher voting rights than class B stocks, e.g. class A might have 10 voting rights per stock while class B only has 1.
A real world example is Google that has 3 different classes of common stock: