Which Is TRUE of Thurstone's Equal-Appearing Intervals Method of Scaling

Multiple Choice

Which is TRUE of Thurstone's equal-appearing intervals method of scaling?

A) It is relatively simple to construct.
B) It demands that the testtaker sort item responses into stacks of similar content.
C) It uses judges' ratings to assign values to items.
D) It is typically devised using proprietary software developed by Louis Thurstone's grandchildren.