问题详情

Some time in the future, the people who are working in Europe would have to pay much higher taxes because _______.
A．more and more children will be born
B．fewer and fewer children will be born
C．they will be making a lot of money
D．the number of retired people will become ever larger此题为多项选择题。请帮忙给出正确答案和分析，谢谢！