Your Coworker Has Just Revealed to You That Even Though

Your coworker has just revealed to you that even though you know him as Geun, a male, he was identified female at birth. What would your book recommend that you do?

A) Question Geun about the process he has undergone to alter his gender, including any surgeries, because this will communicate that you accept him.
B) Inform the rest of your coworkers of Geun's transgender status to save him the awkwardness of having to do it himself.
C) Refer to Geun as "him" if this is how he refers to himself.
D) Introduce Geun to a male coworker you know is gay and single, because Geun most likely is gay himself.