Online mortgage companies have been growing in numbers and size. If all other things are equal, as a result of this growth, traditional banks have had to a. decrease the interest on their mortgage loans as the supply for all mortgage loans decreased. b. increase the number of loans they make and the interest rate they charge. c. decrease the interest on their mortgage loans as the demand for traditional mortgage loans decreased. d. increase the interest on their mortgage loans as the demand for all mortgage loans increased.