The AP style says that a comma is not needed between two clauses that have the same subject. However, it would become ambiguous if I removed the comma fromt the following:
When you walk straight down the hall, you will be met with two doors: the first goes upstairs , and the second goes to the outside.
Is the comma after upstairs required in the AP Style? Is it a clear "YES" or is it subjective? As a side note, is the use of the colon okay according to the AP Style?