Respuesta :
Dr. Jekyll is the main protagonist of the novel 'The strange case.' From the excerpt, it can be seen that Dr. Jekyll was proud and enthusiastic about his research. Thus, option D is correct.
Who is Dr. Jekyll?
Dr. Jekyll is a doctor and the main character of the story who created another monstrous personality of him known as Mr. Hyde. Though he is an intelligent and well-respected scientist he suffers from depressive psychosis.
He experimented in his laboratory and created an evil creature known as Mr. Hyde. Though the research was with a pure intention the result was disastrous.
Therefore, option D. Dr. Jekyll is proud is the correct option.
Learn more about Dr. Jekyll here:
https://brainly.com/question/19903549
#SPJ2