The correct answer to this open question is the following.
We can help you answer this question but we do not know how was your performance in class. Only you know that. That is why this is a personal evaluation. Only you know what grade you deserve.
What we can do to help you answer this, is telling you what to include as the argument to support your grade.
When you make your reflection and say the grade you deserve, you have to support your argument including the reason why. In this part, you explain the kind of effort and commitment you show during the period. Explain the effort and the performance during the period, highlighting the most important moments or activities.
Talk about ypur commitment and dedication and how these two can be converted into the value of the grade you believe you deserve.