逻辑小白，请教大家一道Bible上的题目（weaken类~）

zzzzzzjw

Medical Student: Last week, a certain patient at this hospital weighed 150 lbs. Since the same patient weighs 160 lbs. today, and he appears to be much healthier than he was last week, he would be well advised to gain another ten pounds during the coming

week.

Which of the following, if true, undermines the argument above?

(A) The same scale was used to measure the patient’s weight in both instances.

(B) The patient was notified by his physician of this week’s weight gain.

(C) During the past week, the patient has eaten less food than he would normally eat.

(D) When the patient was weighed last week, an illness had caused the patient’s weight to drop ten pounds below its normal level.

(E) Quick weight loss can be hazardous to one’s health.

①我明白这个题的意思，但是不清楚明确的反驳点是哪里？（增重是导致健康的原因？还是：在coming week要再增重10磅的原因是因为更加健康？）
有点乱，请问大家是怎么判断反驳点具体是什么的呢？
②能不能再帮忙具体解释一下每个选项选和不选的具体原因呢？（正确答案为D）

zzzzzzjw

这个题，是不是变相的告诉我们，之所以想在coming week增重，是因为增重可以让病人更加健康。所以变相暗示我们，应该反驳的因果关系是：增重可以让人更加健康。
我这样的理解对吗？