In One Region of the Dominican Republic, It Is Well

In one region of the Dominican Republic, it is well known that people can be girls until about twelve and then develop male genitals. This is:

A) a made-up myth that has been circulating for centuries but has no basis in reality
B) why the third sex category, guevedoce, exists there
C) always shocking when it happens because it is unexpected there
D) no answer here is correct
E) never accompanied by a gender switch