Which of the following is true?

a. Subprime loans became much more common leading up to the financial crisis.

b. In 2006, more than half of subprime loans were hybrids.

c. Hybrid home loans were often taken out on the assumption that home prices would continue to rise and the borrower expected to refinance when the teaser rates ended.

d. Securities rating agencies gave high rating to securities backed by subprime mortgages.

e. All of these are true.