What invention is so vitally important in the context of ww2 because it with blood transfusions and decreases the spread of infection

he risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation:

google it and it will pop up

i think it is true i hope this is