Which sentence is the correct punctuation usage of the semicolon, colon, or comma?

A
Professor Brown has left; the laboratory, however, you may still be able to reach her through email.

B
Professor Brown; has left the laboratory however; you may still be able to reach her through email.

C
Professor Brown has left the laboratory, however you may; still be able to reach her through email.

D
Professor Brown has left the laboratory; however, you may still be able to reach her through email.