The Experts Say That a Person Under the Age of 40

The experts say that a person under the age of 40 should have a majority of their retirement money invested in the stock markets.What is the reason for this?

A) On average,common stocks provide a higher return on investment than other investment options.
B) Younger people have enough time ahead of them to ride out any dramatic market movements.
C) Younger people generally don't have enough money to invest in other options.
D) All of the above are correct.
E) Only A and B are correct.