Answer:
a) diagnostic assessment.
Step-by-step explanation:
In psychology and education, a diagnostic assessment is a form of test that is done before teaching the actual topic to help the teacher determine the weakness and strengths of the students, in other words, to determine what they already know so the teacher knows where to start the lesson and plan the lessons based on the group needs.
In this example, Mrs. Adams tests her students to determine what prefixes and suffixes they still do not know so she can teach them in the small afternoon group. We can see that she is trying to determine what their students don't know (their weaknesses) so she can plan her afternoon lessons better. Therefore, this would be an example of a diagnostic assessment.