Final answer:
For his digital portfolio in digital media design, Harry should include certificates, images of his work, and professional references.
Step-by-step explanation:
When Harry is creating his digital portfolio for showcasing his abilities in digital media design, he should aim to include a variety of evidence that clearly communicates his skills, experience, and knowledge. To accomplish this goal, Harry should consider including items such as B. certificates which verify his formal qualifications and training, D. images of his work that demonstrate his design capabilities, and E. references from clients or supervisors that attest to his professional competencies.