Johansson's research on the plight of women managers in Sweden and the former West Germany shows that ______.
A．in Sweden, most of the women managers had at least two children and sometimes more
B．the influential signals come not only in the form of equal employment opportunity laws, but also in the support society makes available to families
C．in Germany, most were single women with no children
D．Sweden offers high-quality childcare to almost every family that requests it