GRE逻辑

nancyelvUID: 3273541

8 Drug manufacturer: Although our company requires
that patients who use our new drug also pur-
chase from us nonreusable kits for weekly
blood testing, the expense of those kits is an
entirely necessary one: weekly blood testing
must be done to monitor the drug's potential
side effects, which can be very dangerous.
Which of the following, if true, most seriously weak-
ens the manufacturer's argument?
(A) The expense of purchasing the blood-test kits
has not prevented any patients from obtaining
them or the drug.
(B) Medical laboratories can perform the blood test-
ing at a lower cost to patients or their insurers
than the price the manufacturer charges for the
kits.
(C) A one-year supply of the drug and the weekly
blood-test kits can cost patients or their
insurers over $10,000.
(D) Most government and other health insurance
programs will not reimburse patients for the
full cost of both the drug and the blood-test
kits.
(E) Patients who suffer one or more of the danger-
ous side effects of the drug can incur heavy
expenses for the treatment of those side effects.
答案选B，不是太清楚为什么，求解啊！！！

wsjandzjjUID: 3002956

文章：病人在用new drug时，必须买kits来做blood test来监控side effect，否则会很危险
题目：weaken
B. lab做blood test的价格低于制造商的价格
意思就是不用买制造商的kit