Which of the following contributed to the economic crisis that began in 2007? Group of answer choices Deregulation of financial institutions, which allowed them to engage in risky practices such as subprime mortgages. The collapse of hundreds of savings and loan institutions, which had a ripple effect throughout the American economic system. The influence peddling scheme of the Keating five which led to a housing bubble. Overregulation of Wall Street, which began in the Clinton administration, eventually paralyzed credit markets