Conclusion/Argument: Sheen and Shine should promote its furniture range by recruiting more door-to-door salesmen and spending less on advertising
Reasoning: Evidence that top-rated marketers of novel home appliances relied more on door-to-door selling than advertising
Pre-thinking: We're assuming here that what works for home appliances will also work for furniture.
(A) The leading furniture companies will strive to hire top-notch salesmen from the home appliances industry.
This may be true, but it’s irrelevant to the reasoning. The argument is about what strategy Sheen and Shine should use, not about hiring competition. Eliminate
(B) It has not been firmly established till now whether direct selling contributes more to a company’s revenue or advertising does.
This weakens the conclusion by casting doubt so we cannot use it as an assumption the argument depends on.
(C) Advertising helps in building the image of a company whereas direct selling helps in making a customer understand how to use and maintain products.
This tells us where Advertisements are helpful and where direct selling is helpful but doesn’t bridge the gap between home appliances and furniture.
(D) The marketing techniques that are suitable for successfully promoting novel home appliances can be replicated and would help in selling furniture.
The argument depends on the idea that what worked for home appliances will work for furniture. Without this assumption, the conclusion falls apart. Hold on to this.
(E) Details of the marketing strategies adopted by successful companies are seldom, if ever, made public.
Irrelevant. The argument already claims to know what strategies were used. Eliminate
Answer: (D)