Which of the following sales methods would B best 2 D customers who were unable to visit shops? a. Catalog b. Wholesale c. Retail d. Door-to-door

That depends on several things such as type of product, the market you are in, the reason behind the inability,...

In many markets, online shopping can be the best solution. But in other cases, where internet is not available, distributors and local re-sellers can do the job.

Wholesale/Retailers adopt such practices as they know the trend of the product/quality of the product/price of the product and can make a deal over phone/internet.  Suppliers' agents usually visit these shops with details of the product. Precisely in all the said methods there is an option for the customer not to visit the shops.

I also agree with the views of Mr. Ibrahim Mayaleh