D. to determine which level of classes a student should be placed in.
The COMPASS test is a tool used by colleges to assess and determine the students level of knowledge in order to place them in the correct class level. This test includes reading, writing skills, essay writing, math, among others. Sometimes colleges use the COMPASS for different purposes besides placement such as diagnostics and demographic analysis.
sing because that is what they are doing in the sentence
the simple predicate is the main verb in the predicate that tells what the subject does. example: my father fixed the dryer. read each sentence. draw a line under the complete predicate.