Understanding the argument -
Most shoe stores offer their customers guarantee of replacement of product if any problems related to stitching or pasting arise within a period of six months. - Fact.
In order to avail of such a guarantee, customers are to pay a small membership fee. - Fact.
However, the fee is a total waste of money for the customers (Conclusion) since____________.
Option Elimination - Strengthen
Prethink - There can be a few scenarios. What if
1. The shoes are of very good quality and don't require any replacements in six months.
2. The store is 50 miles away, and a reliable local cobbler is within a mile and can help repair them ASAP.
A. The membership allows the customer to avail of discounts on further buys from the same store - Weakener.
B. The stitching and pasting cause problems only if the products have been exposed to harsh conditions or overuse - defining a minimum condition for stitching and pasting is not the scope of the argument. The scope of the argument is to strengthen the conclusion that "the fee is a total waste of money for the customers."
C. Many customers change their shoes long before six months are up even if the shoes are in good condition - The argument establishes the sufficient condition by saying that "any problems related to stitching or pasting arise within a period of six months" is a sufficient condition or enough or 100% guarantee that "shoe stores offer their customers guarantee of replacement."
"if the shoes are in good condition" doesn't meet this sufficient condition, and we don't know if they'll get a replacement. This is out of scope. Our scope is limited to the shoes that have any problems.
D. The cost borne by the customer for repairing the shoes is not higher than the cost of the membership - "not higher" can mean two things.
Cost is the same - the customer may or may not take it - ambiguous.
Cost higher - definitely an issue.
So the ambiguous effect. No.
E. Most customers readily trade the inconvenience of visiting the stores for product replacement for the services of the local cobblers - It means most never use it. On a lighter note, if we take the best gym membership and never use it or use minimum services, then what's the point in draining the hard-earned money? Sounds familiar?