Mark the letter A, B, C or D to indicate the best arrangement of utterances or sentences to make a meaningful text.
a. Additionally, he established the first labs in Nha Trang.
b. Alexandre Yersin was a Swiss-born doctor.
c. This doctor greatly contributed to medicine and Vietnam by discovering bacteria.
d. He was also the founder of Ha Noi Medical University.
e. His legacy includes a museum and a university named in his honor.