8. Teenagers are often priced out of the labor market by the government-mandated minimum-wage level because employers cannot afford to pay that much for extra help. Therefore, if Congress institutes a subminimum wage, a new lower legal wage for teenagers, the teenage unemployment rate, which has been rising since 1960, will no longer increase.
Which of the following, if true, would most weaken the argument above?
(A) Since 1960 the teenage unemployment rate has risen when the minimum wage has risen.
(B) Since 1960 the teenage unemployment rate has risen even when the minimum wage remained constant.
(C) Employers often hire extra help during holiday and warm weather seasons.
(D) The teenage unemployment rate rose more quickly in the
(E) The teenage unemployment rate has occasionally declined in the years since 1960.
b是怎么消弱的。 那么 A呢/
I think the correct choice is B
since the conclusion is based on a assumption that the unemployment rate is proptional to the minimum wage, the second choice just on the point as it says "unemployment rate has risen even when the minimum wage remained constant."
断桥型削弱
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