【单选题】The period of adolescence, i.e. , the person between childhood and adulthood, may be long or short, depending on social expectations and on society's definition as to what constitutes maturity and adu...
A.
the definition of maturity has changed
B.
the industrialized society is more developed
C.
more education is provided and laws against child labor are made
D.
ceremonies for adolescence have lost their formal recognition and symbolic significance