Answer:
c. preferred stocks
Step-by-step explanation:
Preferred stocks -
It is the type of stock , where there are various features combined together , it is a type of hybrid form of stock , with both debt as well as equity instrument , is referred to as preferred stock.
They are dominate over other stocks.
These stocks are rated by major credit rating companies.
Hence, from the given scenario of the question, the best recommendation is the preferred stock.