As discussed in class, during March 2020, largely due to the economic uncertainty stemming from the spread of the COVID-19 virus, investors began moving towards "safer" assets. As a result corporate bond yield spreads O Increased since treasury bond yields decreased, and corporate bond yields increased. Increased since both treasury bond yields, and corporate bond yields increased. O Decreased since both treasury bond yields, and corporate bond yields decreased. O Decreased since treasury bond yields increased, and corporate bond yields decreased