Answer:
The correct answer is a. The number of U.S. economic analysts.
Explanation:
The subprime mortgage crisis was a financial crisis, due to credit distrust, which, as a growing rumor, initially spread through the US financial markets and was the alarm that targeted Europe's junk mortgages from the summer of 2007, evidencing the following summer with the financial crisis of 2008. Generally, it is considered the trigger for the economic crisis of 2008-2015 at the international level, including the real estate bubble in Spain.
To consider the phenomenon and study its impact, the first variable is not taken into account because it is not directly related to the crisis, and for this reason it is not necessary to recognize what were the variables that negatively impacted in a given period of time.