Answer:
Certificate of Diploma
Step-by-step explanation:
Certificate of Diploma is a kind of a deed or a certificate which is issued or provided by the educational institution like the university or the college, and it testifies that the recipient of the certificate has successfully finished or completed a specific course of study.
So, when it is asked by Susan by the interviewer regarding something she did well in school, she could answer that she has completed the diploma certificate in her school.