Final answer:
In a self-check exercise, if there are no errors in your work but the system says 'Answer is not complete' at the top, it indicates that you missed a step in your answer.
Step-by-step explanation:
In a self-check exercise, if there are no errors in your work but the system says 'Answer is not complete' at the top, it indicates that you missed a step in your answer (c). The green check marks suggest that there are no errors in the steps you did complete.
This is a common message in self-check exercises to remind students to thoroughly check their work and make sure they have followed all the necessary steps in their answer. It helps to ensure that students have a complete understanding of the concept being assessed.
For example, if the question asks for both a mathematical calculation and a written explanation, and the student provides only the calculation, the answer may be marked as incomplete.