Bose released Wireless headphones QC35 as a successor to their vastl

ARGUMENT CONSTRUCTION:
BOSE released a new model as successor to a existing popular model .
the new model released is on the same platform on which its previous one was built with a major feature of them being wireless.
Moreover, the cost for this one has not increased in compassion to previous model.
However, Ear cups of new model are being replaced by users twice as frequently as they were replaced by the user of previous model.

New feature added, cost not increased but ear cups getting replaced more frequently, clearly indicate reduced quality of ear cups to meet the cost requirement.

Conclusion: Quality degraded to meet cost constraint.

ASSUMPTION: The number of usable hrs after the ear-cups are replaced for QC-35 IS same as that of QC 25
Possible Weakeners: Because of the wireless capability ,the use of QC-35 is more than doubled that of QC-25 , requiring users to replace the ear-cups more readily than ever.

Which of the following, if true, most seriously weakens the author’s argument?


(A) Very few of Bose’s customers periodically clean their ear-cups, actions which can increase their life drastically.
This talks about customers who do not take certain measures. This does not weaken the conclusion that quality is degraded to match the cost.
So Incorrect.

(B) Since QC35 is wireless, it can also be worn while sleeping to reduce ambient noise.
This option highlights the use of the newly released model. This points that the number of hours that this product us being used has increased. Because of the significantly increased use it might be possible that they require replacement. So this option brings out an aspect that author ignored while making his conclusion. Hence this option weakens the claim of the author.
Correct

(C) Most ear-cups tear apart when the headphones are stored in a backpack with a sharp object such as a scissor.
This shows how dame could happen to ear cups, but doesn't weaken the conclusion.
So Incorrect

(D) While most QC25s are shared devices, most QC35s are used exclusively as personal devices.
Well i would categorize this as strengthener. Because all this option is saying is that each QC-25 was being used by multiple people but each QC-35 are used by limited number of people
So Incorrect

(E) Bose charges a lower price for replacement ear-cups of QC35 than it does for QC25.
Now this might seem like alternate reason to replace the ear-cups, but think if the quality of ear cups hasn't changed then why is Bose charging less for new model compared to previous model.
So Incorrect.


Please note this is my understanding of argument, it may be incorrect. Appreciate if some experts reply and help point any flaw in my understanding.