Every day, I wake up at 6 a.m. sharp. After I take a shower and wolf down some breakfast, I hurry out to catch the train downtown_____ I get to the office, I get a cup of coffee before reporting to my cubicle.
 Fill in the blank with the correct punctuation and wording
 A) , once 
 B) once, 
 C) ; once 
 D) once;