Final answer:
The Better Business Bureau is the best contact for a consumer with a defective vacuum cleaner, as it specifically handles business-related consumer issues and disputes.
Step-by-step explanation:
If a consumer purchases a vacuum cleaner that stops working properly after a few uses, the best option to address the issue with the store management or the seller is to contact B. The Better Business Bureau (BBB). The BBB is an organization that assists consumers in resolving problems with businesses regarding service and product issues. Other options like contacting the government, a congressperson, or a federal judge are not practical in this situation because the self-correcting mechanisms of the marketplace, such as the work done by organizations like the FTC, are more relevant for addressing consumer grievances. Government agencies generally do not sell products and therefore are not involved in this type of consumer issue. They are funded by tax dollars and do not face the competitive pressures that businesses do, which can force a change or ultimately put a company out of business for poor performance, but they do not engage in resolving individual consumer complaints with merchants or manufacturers.