When the SRY Gene of the Y Chromosome Becomes Active

When the SRY gene of the Y chromosome becomes active (around 7 weeks) , the ____.

A) Müllerian and Wolffian ducts both develop into male reproductive structures
B) Müllerian ducts develop into male reproductive structures and the Wolffian ducts disappear
C) Müllerian ducts disappear and the Wolffian ducts develop into male reproductive structures
D) Müllerian and Wolffian ducts both disappear
E) Müllerian and Wolffian ducts both develop into female reproductive structures