A credit rating agency has just downgraded a company's credit score. How could this impact their stock price and why?
a. The downgrade could decrease investor confidence and result in a stock price decline due to increased perceived risk
b. The downgrade could increase the stock price because investors see it as a buying opportunity
c. The downgrade would have no effect on the stock price as credit ratings and stock prices are unrelated
d. The downgrade could cause the stock price to become volatile as investors try to determine its impact