What’s the general situation for the working mothers in the UK?

A．They come back to work because they can work around the children’s school hours．

B．Even with the bulk of childcare,they can’t enjoy more flexible working hours．

C．They are expected to take the childcare as well as the support of a family．

D．They can’t get the employment because they want a shorter contract．

请帮忙给出正确答案和分析，谢谢！